Uni
t2–Gener
alDi
r
ec
t
i
onforLabor
at
or
yWo
r
ks
Thi
suni
tpr
es
entt
hedi
r
ec
t
i
o
nso
nho
ws
t
udent
spr
epar
et
hems
el
v
est
o
b
er
eadyt
oper
fo
r
m anyl
ab
o
r
at
o
r
yex
per
i
ment
.Thes
t
udent
ss
ho
ul
db
e
fami
l
i
arwi
t
ht
henec
es
s
ar
ymat
er
i
al
s
,appar
at
usand equi
pmentand b
e
o
r
i
ent
edi
npr
o
perr
ec
o
r
di
ngo
fr
es
ul
t
sando
b
s
er
v
at
i
o
n.
Lear
ni
ngOut
c
omes
Att
heendo
ft
hi
suni
tt
hes
t
udent
swi
l
lb
eab
l
et
o
:
1.b
efami
l
i
arwi
t
ht
hedi
ffer
entl
ab
o
r
at
o
r
yappar
at
usneeded;
2.b
eawar
eo
npo
s
s
i
b
l
er
i
s
kandhaz
ar
di
nt
hec
o
ur
s
eo
fper
fo
r
mi
ngt
heex
per
i
ment
and
3.b
er
es
po
ns
i
b
l
eo
npr
o
t
ec
t
i
ngt
heenv
i
r
o
nment
.
Pr
et
es
t
Tes
tI.Ident
i
fyt
henumb
er
edpar
t
so
ft
hel
ab
o
r
at
o
r
ys
et
upb
el
o
w.
Fi
g
ur
e2.
1.Di
s
t
i
l
l
at
i
ons
et
upr
et
r
i
ev
edfr
om
ht
t
ps
:
//en.
wi
ki
pedi
a.
o
r
g
/wi
ki
/Di
s
t
i
l
l
at
i
o
n#/medi
a/Fi
l
e:
S
i
mpl
e_di
s
t
i
l
l
at
i
o
n_appar
at
us
.
s
v
g
Ans
wer
:
1.Aheats
o
ur
c
e
2.Ro
undBo
t
t
o
medFl
as
k
3.S
t
i
l
lhead
4.Ther
mo
met
er
/Bo
i
l
i
ngpo
i
ntt
emper
at
ur
e
5.Co
ndens
er
6.Co
o
l
i
ngwat
eri
n
7.Co
o
l
i
ngwat
ero
ut
8.Di
s
t
i
l
l
at
e/r
ec
ei
v
i
ngfl
as
k
9.Vac
uum/g
asi
nl
et
10.
S
t
i
l
lr
ec
ei
v
er
11.
Heatc
o
nt
r
o
l
12.
S
t
i
r
r
ers
peedc
o
nt
r
o
l
13.
S
t
i
r
r
er
/heatpl
at
e
14.
Heat
i
ng(
o
i
l
/s
and)b
at
h
15.
S
t
i
r
r
i
ngmec
hani
s
m(
no
ts
ho
wn)e.
g
.b
o
i
l
i
ngc
hi
pso
rmec
hani
c
als
t
i
r
r
er
16.
Co
o
l
i
ngb
at
h
Tes
tl
l–Tr
ueo
rFal
s
e.Wr
i
t
eTr
uei
ft
hes
t
at
ementi
sc
o
r
r
ec
tandFal
s
ei
tt
hes
t
at
ement
i
swr
o
ngo
nt
hes
pac
epr
o
v
i
dedb
efo
r
et
henumb
er
.
_Tr
ue__1.Thec
hemi
s
t
r
yl
ab
o
r
at
o
r
yc
anb
eapl
ac
eo
fdi
s
c
o
v
er
yandl
ear
ni
ng
.
_Tr
ue__2.Co
nduc
tyo
ur
s
el
fi
nar
es
po
ns
i
b
l
emanneranyt
i
mei
nt
hel
ab
o
r
at
o
r
y.
_Fal
s
e__3.Wec
ant
o
uc
hany
t
hi
ngi
nt
hel
ab
o
r
at
o
r
yanyt
i
me
_Fal
s
e__4.Wec
anho
l
dapar
t
yi
ns
i
deal
ab
o
r
at
o
r
y.
_Fal
s
e__5.Per
fo
r
masmanyex
per
i
ment
sasyo
uc
ant
opl
eas
et
hei
ns
t
r
uc
t
o
r
.
_Tr
ue__6.Repo
r
tal
lt
heac
c
i
dent
shappenedi
nt
hel
ab
o
r
at
o
r
ynomat
t
erho
wt
r
i
v
i
al
i
tmayappear
.
_Tr
ue__7.Al
lc
hemi
c
al
si
nt
hel
ab
o
r
at
o
r
yar
ec
o
ns
i
der
eddang
er
o
us
.
_Fal
s
e__8.Al
waysr
et
ur
nal
lunus
edc
hemi
c
al
st
oi
t
so
r
i
g
i
nalc
o
nt
ai
ner
.
_Fal
s
e__9.Al
waysaddwat
ert
oac
i
ds
l
o
wl
ywi
t
hs
l
o
ws
t
i
r
r
i
ngands
wi
r
l
i
ng
.
_Tr
ue _10.Ev
erdi
s
pens
efl
ammab
l
el
i
qui
di
nano
penfl
ame.
_Tr
ue__11.Whenr
emo
v
i
ngt
hepl
ugfr
o
mt
heo
ut
l
et
,g
r
as
pt
hepl
ugno
tt
heel
ec
t
r
i
c
al
wi
r
e.
_Fal
s
e_12.Whenheat
i
ngandb
o
i
l
i
ngl
i
qui
dsi
nat
es
tt
ub
e,wec
anpo
i
ntt
heo
penend
t
oanyo
ne.
_Tr
ue_13.Nev
erl
eav
eanyal
i
tb
ur
nero
ranyt
hi
ngt
hati
sb
ei
ngheat
edunat
t
ended.
_Tr
ue__14.Wears
afet
yg
o
g
g
l
eswhenper
fo
r
mi
nganyhaz
ar
do
usex
per
i
ment
.
Tr
ue _15.Bes
ur
et
ofami
l
i
ar
i
z
et
hepr
o
c
edur
eb
efo
r
eper
fo
r
mi
nganyex
per
i
ment
.
Tes
tII–Ex
pl
ai
n
1. Whyi
si
ti
mpo
r
t
antt
ohav
eanemer
g
enc
ys
ho
weri
nac
hemi
s
t
r
yl
ab
o
r
at
o
r
y
?
 Bec
aus
e mo
s
tl
ab
o
r
at
o
r
y env
i
r
o
nment
sc
o
nt
ai
ns an ab
undanc
eo
f
di
ffer
entt
ypeso
fc
hemi
c
al
s
,s
afehandl
i
ngpr
ac
t
i
c
ess
ho
ul
dal
wayss
t
ay
att
het
o
po
fev
er
yo
ne’
smi
nd.Whenc
er
t
ai
nc
hemi
c
al
sc
o
mei
nt
oc
o
nt
ac
t
wi
t
ht
he b
o
dy o
rc
l
o
t
hi
ng
,emer
g
enc
ys
afet
ys
ho
wer
smay b
et
he
di
ffer
enc
eb
et
ween l
i
fe and deat
h.A s
afet
ys
ho
weri
sa pi
ec
eo
f
equi
pmentdes
i
g
nedt
owas
hawayc
hemi
c
al
st
hathav
ec
o
mei
nt
oc
o
nt
ac
t
wi
t
ht
hes
ki
no
rc
l
o
t
hi
ngast
her
es
ul
to
fac
hemi
c
als
pl
as
ho
rs
pi
l
l
.They
ar
eal
s
ous
edt
odi
s
i
nfec
two
r
ker
swhohav
eb
eenex
po
s
edt
oai
r
b
o
r
ne
c
hemi
c
al
so
rt
o
x
i
ns
,s
uc
hasmet
hamphet
ami
ne.
2. Di
s
c
us
st
hei
mpo
r
t
anc
eo
ffi
r
eex
t
i
ng
ui
s
heri
nt
hel
ab
o
r
at
o
r
y.
 Fi
r
eex
t
i
ng
ui
s
her
spl
ayav
i
t
alr
o
l
ei
nanyfi
r
epr
o
t
ec
t
i
o
npl
ani
nany
env
i
r
o
nment
.Theyar
eafi
r
s
tai
dr
es
po
ns
et
ofi
r
eandc
anhel
ppr
ev
ent
c
at
as
t
r
o
phi
cdamag
et
opr
o
per
t
yandev
enl
o
s
so
fl
i
fe.Fr
o
mc
hemi
c
al
st
o
el
ec
t
r
i
c
alequi
pment
,l
ab
o
r
at
o
r
i
esr
eapawi
dear
r
ayo
fs
afet
yhaz
ar
ds
,
whi
c
hi
swhyi
ti
ss
ov
i
t
alt
ounder
s
t
andt
hei
mpo
r
t
anto
fl
abs
afet
y.In
anyl
abt
her
ear
el
o
t
so
fel
ec
t
r
i
c
alc
o
r
dsr
unni
ngt
hr
o
ug
ho
utt
her
o
o
m,
keepi
ngal
lt
heel
ec
t
r
o
ni
c
sr
unni
ngeffi
c
i
ent
l
y.Al
t
ho
ug
hel
ec
t
r
i
c
i
t
yi
s
needed t
or
unt
hr
o
ug
ho
utt
heent
i
r
et
yo
fyo
url
ab
o
r
at
o
r
y,c
o
r
dsc
an
b
ec
o
meas
afet
yhaz
ar
di
fno
thandl
edwi
t
hc
ar
e.Fi
r
ec
anb
r
eako
ut
,
i
ndi
v
i
dual
sc
ant
r
i
pandfal
lo
v
erc
o
r
ds
,o
rel
ec
t
r
i
c
alequi
pmentc
ang
et
des
t
r
o
yedasar
es
ul
to
fafaul
t
yel
ec
t
r
i
c
alc
o
nnec
t
i
o
n.Int
hi
sc
as
e,fi
r
e
ex
t
i
ng
ui
s
heri
sneededt
oex
t
i
ng
ui
s
ht
hefi
r
ei
no
r
dert
opr
ev
entahug
e
damag
ei
ny
o
url
ab
o
r
at
o
r
yandev
enl
o
s
so
fl
i
fe.Iti
sr
eal
l
ynec
es
s
ar
yt
o
b
ec
aut
i
o
usi
n do
i
ngex
per
i
mentand t
ot
heel
ec
t
r
i
c
alwi
r
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unni
ng
t
hr
o
ug
ho
utt
he r
o
o
m t
ob
ec
aus
e equi
pmentc
an b
e damag
ed and
i
ndi
v
i
dual
so
nyo
urt
eamc
anal
s
ob
ei
nj
ur
ed.
3. Ex
pl
ai
nwhywehav
et
ofo
l
l
o
ws
t
andar
dpr
o
c
edur
ei
nt
hel
ab
o
r
at
o
r
y.
 Wehav
et
ofo
l
l
o
ws
t
andar
dpr
o
c
edur
ei
nt
hel
ab
o
r
at
o
r
yi
no
r
dert
ohav
e
as
afewo
r
kpl
ac
e.Itwi
l
ls
ec
ur
et
hear
eao
renv
i
r
o
nmentandt
hequal
i
t
y
o
ft
hes
er
v
i
c
e.Whenwo
r
ki
ngi
nal
ab
,i
ti
si
mpo
r
t
antyo
ut
ob
efami
l
i
ar
wi
t
ht
heequi
pmenti
n yo
urwo
r
ki
ngs
pac
e,ev
en i
fyo
u do
n’
tus
ei
t
yo
ur
s
el
f.Iti
sal
s
oi
mpo
r
t
antt
ob
ec
ar
efulo
fwhato
t
herr
es
ear
c
her
s
,
c
o
wo
r
ker
sand peer
sar
e do
i
ng o
rus
i
ng ar
o
und yo
u.By b
ec
o
mi
ng
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l
i
arwi
t
ht
hel
ab
o
r
at
o
r
yyo
u’
r
ewo
r
ki
ngi
n and al
waysfo
l
l
o
wi
ng
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o
pers
afet
ypr
o
c
edur
es
,yo
uc
anhel
pt
opr
ev
ento
rel
i
mi
nat
ehaz
ar
ds
.
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uwi
l
lal
s
okno
wt
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o
pers
t
epst
ot
akei
nt
heunfo
r
t
unat
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hat
s
o
met
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owr
o
ng
.Lab
sar
edes
i
g
ned t
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t
hs
afet
yi
n mi
nd,
ho
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er
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i
dent
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c
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es
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epr
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t
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t
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ent
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c
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as
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t
ai
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t
udent
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tb
e
pr
o
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l
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i
ent
edo
n:
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eandmai
nt
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ft
hel
ab
o
r
at
o
r
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t
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ai
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al
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at
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o
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at
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i
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rt
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r
mi
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i
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udent
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thav
eo
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t
ai
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o
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ht
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ps
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ei
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l
b
o
xb
efo
r
eyo
ul
eav
e.If
yo
uar
eab
s
entt
hedat
ei
ti
sdue,yo
umus
thandi
ti
nb
efo
r
eho
mer
o
o
mt
hedayy
o
u
r
et
ur
n.Penal
t
i
es
:mi
nus1g
r
adeperday.Labr
epo
r
t
sar
eus
ual
l
y40po
i
nt
seac
h.
Labr
epo
r
t
sar
ec
o
l
l
ec
t
edandkepto
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l
e;fo
rAPs
t
udent
s
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mal
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rb
i
nderi
s
appr
o
pr
i
at
e,s
i
nc
es
o
mec
o
l
l
eg
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equi
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eas
ummar
yo
ft
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per
i
ment
sdo
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las
t
heAPTes
ts
c
o
r
e;t
hec
o
l
l
ec
t
i
o
nwi
l
lb
er
et
ur
nedt
oyo
uwhenyo
ug
r
aduat
e.
FORMAT:
I.
Ti
t
l
ePag
et
i
t
l
ei
nt
hec
ent
ero
ft
hepag
e(
2po
i
nt
s
)
Yo
urname,dat
eper
fo
r
med,c
l
as
sper
i
o
d,andpar
t
ner
(
s
)Ab
s
t
r
ac
t(
s
ho
ul
d
•ab
r
i
efs
ummar
yo
far
es
ear
c
har
t
i
c
l
e,t
hes
i
s
,l
ab
o
r
at
o
r
yr
epo
r
to
ranyi
n-dept
h
anal
ys
i
so
fapar
t
i
c
ul
ars
ub
j
ec
t
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ac
edpr
i
o
rt
ot
hei
nt
r
o
duc
t
i
o
nandpr
o
c
edur
e(
o
nc
o
v
erpag
eo
fl
abr
epo
r
t
)
•o
ft
enus
edt
ohel
pt
her
eaderqui
c
kl
yas
c
er
t
ai
nt
hepaper
'
spur
po
s
e
II.
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pyo
ft
heex
per
i
mentwi
t
hdi
r
ec
t
i
o
ns(
3po
i
nt
s
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Thi
si
nc
l
udest
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j
ec
t
i
v
e,Pr
o
c
edur
e,Theo
r
y,et
c
.Ift
hes
ear
eno
ti
nc
l
uded(
o
r
s
t
ai
ned)
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owr
i
t
et
hemyo
ur
s
el
f
III. Dat
aandRes
ul
t
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eni
fyo
us
c
r
i
b
b
l
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ao
nyo
url
abdi
r
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t
i
o
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(
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nt
s
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et
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o
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at
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ab
l
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r
aphs
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r
i
pt
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o
ns
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c
.
(
us
eyo
urc
o
mput
er
)
IV.
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c
ul
at
i
o
ns(
10po
i
nt
s
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ho
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lc
al
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ul
at
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o
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etyo
ur
r
es
ul
t
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ur
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r
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g
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el
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uar
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us
i
ngEquat
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o
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o
r
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hehandwr
i
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t
enpag
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ho
ul
db
edo
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i
lo
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l
i
nedpaper
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abi
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i
t
at
i
v
eandt
her
ear
enoc
al
c
ul
at
i
o
ns
,po
i
nt
sc
an
b
eadj
us
t
ed.
V.
Co
nc
l
us
i
o
n
Thi
ss
ec
t
i
o
ni
nc
l
udes
:
ANS
WERSTOQUES
TIONSg
i
v
eni
nt
hel
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c
i
s
e.(
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i
nt
s
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i
o
ni
ni
t
al
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et
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t
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nt
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)
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urans
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ot
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j
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i
v
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ft
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i
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t
her
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ul
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f
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per
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t
t
en)
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ral
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ar
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r
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r
s(
i
nex
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rg
r
eat
ert
han30% c
al
l
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rr
epeat
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per
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ment
Requi
r
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sfo
rl
ab
o
r
at
o
r
yex
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s
:
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v
i
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udent
s
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o
r
at
o
r
yg
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wn
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r
yno
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o
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ype
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c
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fi
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at
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ub
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s
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i
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ue,det
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ent
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i
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equi
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uri
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t
r
uc
t
o
r
B.Tob
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o
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i
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yt
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ademi
ci
ns
t
i
t
ut
i
o
n
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o
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at
o
r
yfac
i
l
i
t
y
2. Lab
o
r
at
o
r
yg
l
as
swar
es
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at
us
,i
ns
t
r
ument
sandequi
pment
3. Reag
entg
r
adec
hemi
c
al
,pr
i
mar
yands
ec
o
ndar
ys
t
andar
ds
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hemi
c
al
i
ndi
c
at
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r
sand
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t
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o
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uc
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g
enc
ys
ho
wer
,fi
r
eex
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i
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ui
s
her
,
eyewas
hs
t
at
i
o
nandfi
r
s
tai
dki
t
.
C. Tob
eo
b
s
er
v
edb
yt
hes
t
udent
s
:
1. Lab
o
r
at
o
r
ys
afet
yr
ul
esandg
ui
del
i
nes
 Onl
yper
s
o
nst
hatar
ei
nt
r
o
duc
edt
os
afet
yr
ul
esandfi
r
s
tai
d
met
ho
dsar
eal
l
o
wedwo
r
ki
nc
hemi
c
all
ab
o
r
at
o
r
y.S
t
udent
s
'
kno
wl
edg
ei
st
es
t
ed.
 S
t
udentmus
to
b
eyes
t
ab
l
i
s
hedo
r
deri
nt
hewo
r
kpl
ac
e,t
akec
ar
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f
hi
so
rherheal
t
hando
fc
o
l
l
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t
h,per
fo
r
mr
equi
r
ement
so
f
t
hi
si
ns
t
r
uc
t
i
o
n.
 S
t
udent
sc
an'
tus
edev
i
c
es
,whi
c
hhav
edefec
t
sandmus
tr
epo
r
t
l
ec
t
ur
erab
o
utt
hemandi
nt
o
x
i
c
at
edper
s
o
nsar
eno
tal
l
o
wedt
owo
r
k.
 Al
lwo
r
ksi
nc
hemi
c
all
ab
o
r
at
o
r
ymus
tb
eper
fo
r
medo
nl
yi
fg
asand
el
ec
t
r
i
c
i
t
ys
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ys
ys
t
emswo
r
kc
o
r
r
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t
,andfumeho
o
di
sfunc
t
i
o
nal
.
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o
i
dac
t
i
o
ns
,whi
c
hc
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o
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t
i
o
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,fav
o
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ab
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et
ofi
r
e.
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t
udent
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tb
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nt
r
o
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r
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i
mi
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o
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ur
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c
o
o
r
di
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rac
t
i
o
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i
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r
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er
.
 Do
n'
tus
edefec
ts
o
c
ket
s
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ug
s
,s
wi
t
c
hesando
t
herdefec
tequi
pment
.
 Do
n'
tc
o
nnec
tt
oo
nes
o
c
kets
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er
alhi
g
hpo
werdev
i
c
es
,i
ft
hei
r
r
equi
r
emento
fc
ur
r
entmayex
c
eedper
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i
l
i
t
yo
fi
ns
t
al
l
at
i
o
n
c
ab
l
es
.
 Wo
r
kc
ar
eful
l
ywi
t
hl
ab
o
r
at
o
r
yequi
pment
,g
l
as
s
war
eanddev
i
c
es
ands
t
ar
two
r
kwi
t
ht
hemo
nl
yaft
erl
ear
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ous
et
hem.
 Ifequi
pmenti
sb
r
o
ken,r
epo
r
tt
ol
ab
o
r
at
o
r
ywo
r
keri
mmedi
at
el
y
.
 Co
nnec
t
i
o
no
ft
hedev
i
c
esmus
tb
ec
hec
kedb
yl
ab
o
r
at
o
r
yas
s
i
s
t
ant
b
efo
r
eus
e.
 Ifg
as
,wat
ers
uppl
y,c
anal
i
z
at
i
o
n,el
ec
t
r
i
c
i
t
ys
ys
t
emdefec
ti
s
no
t
i
c
ed,r
epo
r
tt
ol
ab
o
r
at
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r
ywo
r
ker
.
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o
wi
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t
i
c
ed,c
l
o
s
eg
asv
al
v
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n'
ts
wi
t
c
ho
nany
dev
i
c
es
,whi
c
hc
ani
nduc
efl
ameo
rs
par
ks
.
 Whenl
eav
i
ngl
ab
o
r
at
o
r
y,c
hec
ki
fal
lel
ec
t
r
i
c
alandg
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i
c
esar
e
s
wi
t
c
hedo
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ent
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ng
l
ab
o
r
at
o
r
yper
s
o
ni
sdi
r
ec
t
l
yr
es
po
ns
i
b
l
efo
rt
hi
sr
equi
r
ement
.
 Eac
hl
ab
o
r
at
o
r
ymus
tc
o
nt
ai
n:fi
r
s
tai
dmedi
c
ament
s
,s
andb
o
xfo
r
fi
r
eex
t
i
ng
ui
s
h,wo
o
l
enb
l
anket
,r
es
i
ng
l
o
v
esands
ho
es
,r
es
i
nc
ar
pet
fo
ri
s
o
l
at
i
o
n,s
afet
yg
l
as
s
es
.
 Ifac
c
i
dentt
o
o
kpl
ac
e,hel
pi
nj
ur
edper
s
o
nwi
t
hfi
r
s
tai
dandc
al
l
emer
g
enc
ymedi
c
als
er
v
i
c
ei
fi
sneeded.
 Repo
r
tac
c
i
dentt
ol
eaderanddo
n'
tc
hang
eanyt
hi
ngi
nac
c
i
dent
l
o
c
at
i
o
n,unl
es
si
tc
aus
esdang
ert
opeo
pl
e.Nec
es
s
ar
yc
hang
esmus
t
b
eno
t
edi
nac
t
.
 Wo
r
ko
nl
ywi
t
hc
l
eanl
ab
o
r
at
o
r
yr
o
b
es
.Was
hhandsb
efo
r
eandaft
er
wo
r
kwi
t
hwar
mwat
erands
o
ap,us
edi
s
i
nfec
t
i
o
nandneut
r
al
i
z
at
i
o
n
meas
ur
es
.
 Do
n'
tkeepfo
o
datt
hewo
r
kpl
ac
e,eato
nl
yi
ns
pec
i
alpl
ac
e.
2. Wo
r
ki
ngwi
t
hChemi
c
alReag
ent
s
 Fl
ammab
l
eS
o
l
ut
i
o
nsmus
tb
eho
l
di
nt
hi
c
kg
l
as
sdi
s
heswi
t
hpo
l
i
s
hedc
o
r
ks
.
 Br
o
mi
ne,pho
s
pho
r
us
,al
kal
i
nemet
al
s
,c
o
nc
ent
r
at
edac
i
ds
uppl
ymus
tb
e
kepti
npl
ac
e,s
afei
nc
as
eo
ffi
r
e.
 Onpac
kag
ewi
t
hc
hemi
c
alr
eag
entmus
tc
o
nt
ai
nl
ab
elwi
t
hnameo
f
s
ub
s
t
anc
eandi
t
spur
i
t
y.
 Al
lex
per
i
ment
swi
t
hs
t
r
o
ngs
mel
l
i
ng
,ex
pl
o
s
i
v
e,dang
er
o
ust
oheal
t
ho
r
v
o
l
at
i
l
es
ub
s
t
anc
esar
eper
fo
r
medi
nfumeho
o
d,wi
t
hpr
o
t
ec
t
i
ngg
l
as
s
l
o
wer
ed.
 Whenwo
r
ki
ngwi
t
hs
t
r
o
ngs
mel
l
i
ng
,dus
t
y,dang
er
o
ust
oheal
t
h
s
ub
s
t
anc
esno
ti
nt
hefumeho
o
d,r
es
pi
r
at
o
r
ymas
kands
afet
yg
l
as
s
es
mus
tb
eus
ed.
 Fl
ammab
l
es
ub
s
t
anc
esandheat
i
ngdev
i
c
esmus
tb
ehandl
edex
t
r
emel
y
c
ar
eful
l
y.Do
n'
theatet
her(
C2H5-O-C2H5)
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l(
C2H5-OH)
,pet
r
o
l
(
Cs
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i
ngo
penedfl
ameo
ro
penedel
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t
r
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c
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hem
c
ar
eful
l
y,o
nc
l
o
s
edel
ec
t
r
i
c
alc
o
o
kero
ri
nwat
erb
at
h.
 Int
hefl
ami
ngv
o
l
at
i
l
e,no
ts
o
l
v
i
ngi
nwat
ers
ub
s
t
anc
es
,fl
ami
ngac
t
i
v
e
met
al
sfi
r
emus
tb
eex
t
i
ng
ui
s
hedwi
t
hs
and.Theyc
an'
tb
eex
t
i
ng
ui
s
hed
wi
t
hwat
er
.
3. Pr
o
perhandl
i
ngandmai
nt
enanc
eo
fappar
at
us
,i
ns
t
r
umentand
equi
pmentaswel
lasl
ab
o
r
at
o
r
yfac
i
l
i
t
y.Gl
as
swar
ess
ho
ul
db
epr
o
per
l
y
c
l
eanedwi
t
hi
mpur
i
t
i
est
hatmi
g
htaffec
tr
es
ul
t
so
fanal
ys
i
s
.
4. Ob
s
er
v
emat
er
i
als
uppl
yandener
g
yc
o
ns
er
v
at
i
o
n.
D.Lab
o
r
at
o
r
yr
epo
r
twr
i
t
i
ngfo
r
matandg
ui
del
i
nesadapt
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o
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Co
mmo
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ab
o
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at
o
r
yappar
at
usfo
rAnal
yt
i
c
alChemi
s
t
r
ypr
es
ent
edo
nt
henex
tpag
es
wer
er
et
r
i
ev
edfr
o
mt
hefo
l
l
o
wi
ngl
i
nks
:
Fi
g
.
2.
2.
ht
t
ps
:
//www.
pub
l
i
c
do
mai
npi
c
t
ur
es
.
net
/en/v
i
ew
i
mag
e.
php?i
mag
e=54631&pi
c
t
ur
e=l
ab
o
r
at
o
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as
s
war
e
Fi
g
.2.
3.ht
t
ps
:
//en.
wi
ki
pedi
a.
o
r
g
/wi
ki
/Buns
en_b
ur
ner
Fi
g
.2.
4.ht
t
ps
:
//c
o
mmo
ns
.
wi
ki
medi
a.
o
r
g
/wi
ki
/Fi
l
e:
Anal
yt
i
c
al
_Bal
anc
e.
JPG
Fi
g
.2.
5.ht
t
ps
:
//www.
px
fuel
.
c
o
m/en/fr
ee-pho
t
o
-j
z
apw
Fi
g
.2.
6.ht
t
ps
:
//c
o
mmo
ns
.
wi
ki
medi
a.
o
r
g
/wi
ki
/Fi
l
e:
S
pec
t
r
o
pho
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o
met
er
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del
_1.
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Fi
g
.2.
7.ht
t
ps
:
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i
ndi
amar
t
.
c
o
m/pr
o
ddet
ai
l
/l
ab
o
r
at
o
r
y-ph-met
er
15063679812.
ht
ml
Fi
g
.2.
8.ht
t
ps
:
//c
o
mmo
ns
.
wi
ki
medi
a.
o
r
g
/wi
ki
/Fi
l
e:
Mag
net
i
c
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t
i
r
r
er
.
JPG
Fi
g
.
2.
9.
ht
t
ps
:
//www.
wal
l
paper
fl
ar
e.
c
o
m/fo
ur
-c
l
ear
-g
l
as
s
-l
ab
o
r
at
o
r
y-equi
pment
s
ex
per
i
ment
s
c
i
enc
e-c
hemi
s
t
r
y-wal
l
paper
-wmg
no
Fi
g
.2.
2.Labor
at
or
yg
l
as
s
war
es
Fi
g
.2.
4.El
ec
t
r
oni
cAnal
yt
i
c
albal
anc
e
Fi
g
.2.
3.heat
i
ngs
et
upwi
t
hg
ass
uppl
y
Fi
g
.2.
5.Di
g
i
t
alt
opl
oadi
ngbal
anc
e
Fi
g
.2.
6.S
pec
t
r
ophot
omet
er
Fi
g
.2.
7.pHmet
er
Fi
g
.2.
8.El
ec
t
r
i
cheat
erwi
t
h
s
t
i
r
r
er
Fi
g
.2.
9.Anal
yt
i
c
alappar
at
us
Lear
ni
ngAc
t
i
v
i
t
i
es
Ac
t
i
v
i
t
y1
Fi
g
ur
e2.
10o
nt
henex
tpag
epr
es
ent
sv
o
l
umet
r
i
cg
l
as
swar
es
.Makeal
i
s
to
ft
hes
eand
ar
r
ang
eac
c
o
r
di
ngt
ot
hedeg
r
eeo
fac
c
ur
ac
yfr
o
mt
hes
i
mpl
es
tt
ot
hemo
s
tac
c
ur
at
e
v
o
l
umet
heappar
at
usc
anmeas
ur
e.
Fi
g
.2.
10.Vol
umet
r
i
cg
l
as
s
war
es
Ans
wer
:
Fr
o
mt
hes
i
mpl
es
tt
ot
hemo
s
tac
c
ur
at
ev
o
l
umet
heappar
at
usc
anmeas
ur
e.
1.Beaker
s
2.Fl
as
k
3.Gr
aduat
edc
yl
i
nder
4.Vo
l
umet
r
i
cfl
as
k
5.Bur
et
t
es
6.Pi
pet
s
Ac
t
i
v
i
t
y2
Pr
es
ent
edb
el
o
war
es
o
mehaz
ar
dsenc
o
unt
er
edi
nawo
r
kpl
ac
e.Cl
as
s
i
fyt
hehaz
ar
ds
ac
c
o
r
di
ngt
oS
afet
yhaz
ar
ds
,Chemi
c
alHaz
ar
ds
,Bi
ol
og
i
c
alHaz
ar
dsandot
her
Haz
ar
ds
.
ho
ts
ur
fac
es
v
i
r
us
es
s
l
i
pper
yfl
o
o
r
s
c
l
eani
ngpr
o
duc
t
s
no
i
s
e
pes
t
i
c
i
des
b
ac
t
er
i
a
s
t
r
es
s
v
i
b
r
at
i
o
n
l
ac
ko
ffi
r
eex
i
t
s
uns
afel
adder
s
po
o
rai
rqual
i
t
y
s
o
l
v
ent
s
ar
east
o
odar
ko
rt
o
ob
r
i
g
ht
mo
l
d
v
ehi
c
l
esg
as
o
l
i
ne
r
adi
at
i
o
n
c
l
ut
t
er
edwo
r
kar
ea,
mac
hi
neswi
t
ho
utg
uar
ds
fal
l
i
ngo
b
j
ec
t
s
ac
i
ds
v
i
o
l
enc
e
ani
mal
s
heato
rc
o
l
d
as
b
es
t
o
s
b
i
r
ds
r
epet
i
t
i
v
emo
v
ement
s
har
pkni
v
es
l
ead
i
ns
ec
t
s
awkwar
dpo
s
t
ur
e
o
z
o
ne(
fr
o
mc
o
pi
er
s
)
po
i
s
o
ni
v
y
heav
yl
i
ft
i
ng
ho
tg
r
eas
e
uns
afeel
ec
t
r
i
cc
i
r
c
ui
t
s
wo
o
ddus
t
po
i
s
o
no
ak
fas
tpac
eo
fwo
r
k
mer
c
ur
y
us
edneedl
es
Ans
wer
:
S
afet
y
Haz
ar
ds
Mac
hi
nes
wi
t
ho
utg
uar
ds
Uns
afe
l
adder
s
Uns
afe
el
ec
t
r
i
c
c
i
r
c
ui
t
s
Ho
ts
ur
fac
es
Chemi
c
al
Haz
ar
ds
Cl
eani
ng
pr
o
duc
t
s
Ac
i
ds
Bi
o
l
og
i
c
al
Haz
ar
ds
Ins
ec
t
s
S
o
l
v
ent
s
Bac
t
er
i
a
Er
g
onomi
c
Haz
ar
ds
Awkwar
d
po
s
t
ur
e
Heatandc
o
l
d Repet
i
t
i
v
e
mo
v
ement
Radi
at
i
o
n
Vi
b
r
at
i
o
n
Vehi
c
l
es
g
as
o
l
i
ne
Fal
l
i
ngo
b
j
ec
t
s Pes
t
i
c
i
des
Wo
o
ddus
t
S
l
i
pper
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o
o
r
s Heav
yl
i
ft
i
ng
Bi
r
ds
As
b
es
t
o
s
Po
i
s
o
no
ak
Ani
mal
s
Ho
tg
r
eas
e
Po
i
s
o
ni
v
y
Mo
l
d
S
har
pkni
v
es
Oz
o
ne(
fr
o
m
c
o
pi
er
s
)
Mer
c
ur
y
Lead
Cl
ut
t
er
edwo
r
k
ar
ea
Po
o
rai
r
qual
i
t
y
Ar
east
odar
k
o
rt
o
ob
r
i
g
ht
Lac
ko
ffi
r
e
ex
i
t
Us
edneedl
es
Vi
r
us
es
Phys
i
c
al
Haz
ar
ds
No
i
s
e
Ps
yc
hos
oc
i
al
Haz
ar
ds
Vi
o
l
enc
e
S
t
r
es
s
Fas
tpac
eo
f
wo
r
k
Ac
t
i
v
i
t
y3
Li
s
tdo
wni
mpo
r
t
anti
nfo
r
mat
i
o
nyo
uc
ang
etfr
o
mc
hemi
c
alr
eag
entl
ab
el
s
.Ho
wc
o
ul
dyo
upr
o
t
ec
tt
he
env
i
r
o
nmentwhi
l
eex
pl
o
r
i
ngl
ab
o
r
at
o
r
yex
per
i
ment
s
?
Fi
g
.2.
11.Chemi
c
alr
eag
ent
sr
et
r
i
ev
edfr
om
ht
t
ps
:
//c
ommons
.
wi
ki
medi
a.
or
g
/wi
ki
/Fi
l
e:
Chempur
_r
eag
e
nt
s
.
j
pg
Ans
wer
:
 Thel
ab
elc
o
ns
i
s
t
so
fs
ev
er
alpar
t
s
:
Chemi
c
alname:Li
s
t
st
henameo
ft
hec
hemi
c
al
.Manyc
hemi
c
al
shav
es
ev
er
als
yno
nymsduet
ov
ar
i
o
us
s
ys
t
emso
fno
menc
l
at
ur
e.Thi
sc
ang
etal
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t
t
l
ec
o
nfus
i
ng
,s
ot
hemo
s
tc
o
mmo
nl
y-us
edname(
ac
c
o
r
di
ngt
ot
he
t
ex
t
sus
edfo
rt
het
eac
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ngl
ab
s
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utmo
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ft
ent
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o
mmendedb
yt
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l
at
ur
es
ys
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em)
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l
lappearher
e.
Chemi
c
als
ynonyms
:Li
s
t
so
t
hernameso
ft
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hemi
c
al
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ft
her
ear
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ri
ns
t
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o
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ks
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t
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l
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t
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ar
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at
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at
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at
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ual
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yt
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rex
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at
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at
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ar
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at
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s
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al
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l
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ar
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at
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s
ho
ul
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r
eat
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er
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us
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ent
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c
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eno
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ec
hemi
c
al
s(
fo
ri
ns
t
anc
e,aqueo
uss
al
ts
o
l
ut
i
o
ns
)
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l
lno
ti
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l
udeahaz
ar
dr
at
i
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amo
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nt
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rl
ab
el
s
.
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pec
i
fi
chaz
ar
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ar
dr
at
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ng
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r
dsappear
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ngher
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awyo
urat
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o
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i
fi
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ar
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o
ft
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ent
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IVE!o
rPOIS
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l
lappeari
ft
heheal
t
h(
b
l
ue)r
at
i
ngi
s3o
rg
r
eat
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.
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l
lappeari
ft
hefl
ammab
i
l
i
t
y(
r
ed)r
at
i
ngi
s3o
rg
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eat
er
.EXPLOS
IVE!o
rEXTREMELY
REACTIVE!wi
l
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v
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t
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o
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at
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r
eat
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l
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t
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et
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ar
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fi
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ar
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t
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lb
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l
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o
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el
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o
l
o
r
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o
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at
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or
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ar
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rex
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ehaz
ar
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l
o
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t
ab
i
l
i
t
yhaz
ar
d.
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uemeansaheal
t
hhaz
ar
d.
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t
ei
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c
at
ess
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i
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ar
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rex
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d,andc
o
r
r
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.
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so
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els
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r
eeo
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ar
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ni
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l
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g
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ar
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der
at
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ar
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o
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ar
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er
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ar
d
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o
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tt
heenv
i
r
o
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l
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pl
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ngl
ab
o
r
at
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yex
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ment
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ho
ul
dpr
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pment
us
i
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t
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o
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g
hthappenswhi
l
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o
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i
ngt
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ments
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haswat
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s
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eb
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anket
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t
heremer
g
enc
yequi
pmentneeded.Toav
o
i
ds
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hhar
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eper
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us
s
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o
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ti
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mpo
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afet
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r
s
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r
ai
nedandadher
e
s
t
r
i
c
t
l
yt
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her
ul
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ui
del
i
nesputi
n pl
ac
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hi
s
,hel
pb
r
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ero
ft
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e
s
t
i
pul
at
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o
nst
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l
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affo
rs
t
udent
st
onav
i
g
at
et
heenv
i
r
o
nmenti
nawayt
hatr
educ
est
he
r
i
s
ko
fi
nj
ur
yanddamag
et
ot
heenv
i
r
o
nment
.
Fo
rmo
r
ei
nfo
r
mat
i
o
nab
o
utl
ab
el
l
i
ngr
equi
r
ement
,pl
eas
ec
l
i
c
kt
hel
i
nk:
ht
t
ps
:
//www.
os
ha.
g
ov
/Publ
i
c
at
i
ons
/OS
HA3636.
pdf
As
s
es
s
ment
Tes
tI.Di
r
ec
t
i
on:Fi
l
li
nt
heb
l
ankwi
t
ht
hec
o
r
r
ec
tfunc
t
i
o
no
fanappar
at
us
.
1.Weus
eab
eakert
o_____ho
l
d_________al
i
qui
d.
2.Weus
eat
es
tt
ub
et
o______ho
l
d_______al
i
qui
d.
3.Weus
eat
es
t
-t
ub
er
ac
kt
o______ho
l
d________t
es
tt
ub
esi
npl
ac
e.
4.Weus
eag
l
as
sr
o
dt
o_____s
t
i
r
_______al
i
qui
di
nab
eaker
.
5.Weus
eadr
o
ppert
o______t
r
ans
fer
__________as
mal
lamo
unto
fl
i
qui
d.
6.Weus
eas
pat
ul
at
o______t
r
ans
fer
_________as
mal
lamo
unto
fs
o
l
i
d.
7.Weus
eaBuns
enb
ur
nert
o______heat
_________wat
eri
nab
eaker
.
8.Weus
eat
r
i
po
dandawi
r
eg
auz
et
o_____s
uppo
r
t
______t
heb
eakerdur
i
ngheat
i
ng
.
9.Weus
eaheat
-pr
o
o
fmatt
o_____pr
o
t
ec
t
_________t
heb
enc
hdur
i
ngheat
i
ng
.
10.Weus
eanel
ec
t
r
o
ni
cb
al
anc
et
o_____meas
ur
e_______wei
g
ht
.
11.Weus
eameas
ur
i
ngc
yl
i
ndert
o_____meas
ur
e________t
hev
o
l
umeo
fal
i
qui
d.
Tes
tII.
Whatappar
at
usdoweneedi
no
r
dert
oc
ar
r
yo
utt
hefo
l
l
o
wi
ngs
t
epsi
nanex
per
i
ment
?
1.Meas
ur
e200mlo
fwat
erandb
o
i
lt
hewat
er
.
Appar
at
usneeded:Meas
ur
i
ngc
yl
i
nder
,b
eaker
,Buns
enb
ur
ner
,t
r
i
po
d,wi
r
eg
auz
e,heat
-pr
o
o
fmat
2.Takeo
ut10dr
o
pso
fl
i
qui
dAfr
o
mb
o
t
t
l
eAand10dr
o
pso
fl
i
qui
dBfr
o
mb
o
t
t
l
eB.Mi
xAandB.
Appar
at
usneeded:Dr
o
pper
,t
es
tt
ub
e
3.Meas
ur
e5go
fs
al
tand100mlo
fwat
er
.Di
s
s
o
l
v
et
hes
al
ti
nwat
erb
ymi
x
i
ngands
t
i
r
r
i
ngt
hem.
Appar
at
usneeded:(
el
ec
t
r
o
ni
c
)b
al
anc
e,meas
ur
i
ngc
yl
i
nder
,b
eaker
,andg
l
as
sr
o
d
Tes
tIII.
Inus
i
ngc
hemi
c
alr
eag
ent
,ho
wwo
ul
dyo
ukno
wt
hehaz
ar
di
tpo
s
est
ous
erandt
heenv
i
r
o
nment
?Ho
wc
o
ul
d
yo
upr
ev
entenv
i
r
o
nment
aldamag
ewhenper
fo
r
mi
nganex
per
i
ment
?
 Tokeepyo
urwo
r
kpl
ac
es
afe,i
ti
si
mpo
r
t
antt
hatyo
uunder
s
t
andwhathaz
ar
do
usc
hemi
c
al
sar
eand
ho
wt
oi
dent
i
fyt
hem.Toi
dent
i
fyi
fas
ub
s
t
anc
ei
shaz
ar
do
us
,c
hec
kt
hepr
o
duc
t
'
sc
o
nt
ai
nerl
ab
el
and/o
rt
heS
DSwhi
c
hi
sav
ai
l
ab
l
efr
o
mt
hes
uppl
i
er
.Ifapr
o
duc
ti
sno
tc
l
as
s
i
fi
edasahaz
ar
do
us
c
hemi
c
alundert
heWo
r
kHeal
t
handS
afet
yAc
t2011,aS
DSi
sno
tr
equi
r
edandt
her
efo
r
emayno
tb
e
av
ai
l
ab
l
e.Ifyo
uar
euns
ur
e,al
way
sc
hec
kwi
t
ht
hepr
o
duc
t
'
ss
uppl
i
er
.Thel
ab
el
so
fhaz
ar
do
us
c
hemi
c
al
sus
ual
l
yc
o
nt
ai
nt
hewo
r
ds'
dang
er
'o
r'
war
ni
ng
'
,al
o
ngwi
t
hr
el
ev
antpi
c
t
o
g
r
amsanddet
ai
l
s
o
fhaz
ar
ds
.Poi
ntoutt
he“
s
i
g
nal
”wor
dsonl
abel
s
.S
i
g
nalwo
r
dsar
efr
equent
l
yus
edo
nl
ab
el
st
o
qui
c
kl
yi
nfo
r
m us
er
sho
wdang
er
o
ust
hec
hemi
c
ali
sandwhatt
hes
pec
i
fi
cs
afet
yandheal
t
hhaz
ar
ds
ar
e.Fo
rex
ampl
e:
•“
Dang
er
”meanst
hatt
hec
hemi
c
alc
anc
aus
ei
mmedi
at
es
er
i
o
usi
nj
ur
yo
rdeat
h.
•“
War
ni
ng
”meanst
hati
tc
anc
aus
es
er
i
o
usi
nj
ur
yo
rdeat
h.
•“
Caut
i
o
n”meanst
hatmo
der
at
ei
nj
ur
yi
spo
s
s
i
b
l
e.
•“
Fl
ammab
l
e”meanst
hatt
hec
hemi
c
alc
anc
at
c
hfi
r
eeas
i
l
y.
•“
Reac
t
i
v
e”meansi
tc
anb
ur
n,ex
pl
o
de,o
rr
el
eas
et
o
x
i
cv
apo
r
si
fi
tc
o
mesi
nc
o
nt
ac
twi
t
hheat
,ai
r
,
wat
er
,o
ro
t
herc
hemi
c
al
s
.
•“
To
x
i
c
”meanspo
i
s
o
no
us
;t
hec
hemi
c
alc
anc
aus
ei
l
l
nes
so
rev
endeat
h.
•“
Tar
g
eto
r
g
ant
o
x
i
c
”meansi
tc
ani
nj
ur
es
pec
i
fi
co
r
g
ans
.
•“
Co
r
r
o
s
i
v
e”meanst
hatt
hec
hemi
c
alc
anb
ur
no
rev
endes
t
r
o
ys
ki
n,l
ung
s
,o
reyeso
nc
o
nt
ac
t
.
Makes
ur
eempl
o
yeesunder
s
t
andt
hemeani
ngo
fal
lt
hes
i
g
nalwo
r
dso
nt
hel
ab
el
so
fc
hemi
c
al
sus
ed
i
nyo
urwo
r
kpl
ac
e.
Toyo
upr
ev
entenv
i
r
o
nment
aldamag
ewhenper
fo
r
mi
nganex
per
i
ment
?
 Topr
ev
entenv
i
r
o
nment
aldamag
ewhen per
fo
r
mi
ngan ex
per
i
ment
,i
ti
sneeded t
or
ead and
under
s
t
andt
hec
hemi
c
alMS
DS
sb
efo
r
eex
per
i
ment
at
i
o
n,andIs
ho
ul
dpr
epar
eanequi
pmentus
i
ng
fo
ranys
i
t
uat
i
o
nmi
g
hthappenswhi
l
eex
pl
o
r
i
ngt
heex
per
i
ments
uc
haswat
er
,fi
r
eex
t
i
ng
ui
s
her
,fi
r
e
b
l
anket
sand o
t
heremer
g
enc
y equi
pmentneeded.To av
o
i
ds
uc
h har
mfulr
eper
c
us
s
i
o
ns
,i
ti
s
i
mpo
r
t
antt
oal
waysputs
afet
yfi
r
s
tb
yens
ur
i
ngal
ll
abmemb
er
sar
ev
er
y-wel
lt
r
ai
nedandadher
e
s
t
r
i
c
t
l
yt
ot
her
ul
esand g
ui
del
i
nesputi
n pl
ac
e.Byt
hi
s
,hel
pb
r
eaksdo
wn a numb
ero
ft
hes
e
s
t
i
pul
at
i
o
nst
oenab
l
enews
t
affo
rs
t
udent
st
onav
i
g
at
et
heenv
i
r
o
nmenti
nawayt
hatr
educ
est
he
r
i
s
ko
fi
nj
ur
yanddamag
et
ot
heenv
i
r
o
nment
.
Refer
enc
es
:
Hami
l
t
o
n,L.andS
i
mps
o
n,S
.(
1971)
,Quant
i
t
at
i
v
eChemi
c
alAnal
ys
i
s
,12thEdi
t
i
o
n.
Heal
t
handS
afet
yAwar
enes
so
fWo
r
ki
ngTeens
:Ident
i
fyi
ngWo
r
kpl
ac
eHaz
ar
ds
.
ht
t
ps
:
//os
ha.
was
hi
ng
t
on.
edu/s
i
t
es
/defaul
t
/fi
l
es
/doc
ument
s
/GenUni
t
2%202010.
pdf
Label
sandPi
c
t
og
r
ams
ht
t
ps
:
//www.
os
ha.
g
ov
/Publ
i
c
at
i
ons
/OS
HA3636.
pdf
S
epar
at
i
o
nb
yS
i
mpl
eandFr
ac
t
i
o
nal&Di
s
t
i
l
l
at
i
o
nandAnal
ys
i
sb
yGasChr
o
mat
o
g
r
aphy
ht
t
ps
:
//www.
r
oanoke.
edu/doc
ument
s
/c
hemi
s
t
r
y/ex
p9_di
s
t
i
l
l
at
i
on_2010fa_r
ev
.
pdf
ht
t
p:
//en.
wi
ki
pedi
a.
or
g
/wi
ki
/Fi
l
e:
S
i
mpl
e_di
s
t
i
l
l
at
i
on_appar
at
us
.
s
v
g
ht
t
ps
:
//c
ommons
.
wi
ki
medi
a.
or
g
/wi
ki
/Fi
l
e:
Bot
t
l
es
_of_c
hemi
c
al
s
_(
1)
.
j
pg
ht
t
ps
:
//www.
publ
i
c
domai
npi
c
t
ur
es
.
net
/en/v
i
ew-i
mag
e.
php?i
mag
e=54631&pi
c
t
ur
e=l
abor
at
or
y-g
l
as
s
war
e
ht
t
ps
:
//en.
wi
ki
pedi
a.
or
g
/wi
ki
/Buns
en_bur
ner
ht
t
ps
:
//c
ommons
.
wi
ki
medi
a.
or
g
/wi
ki
/Fi
l
e:
Anal
yt
i
c
al
_Bal
anc
e.
JPG
ht
t
ps
:
//www.
px
fuel
.
c
om/en/fr
ee-phot
o-j
z
apw
ht
t
ps
:
//c
ommons
.
wi
ki
medi
a.
or
g
/wi
ki
/Fi
l
e:
S
pec
t
r
ophot
omet
er
_Model
_1.
JPG
ht
t
ps
:
//www.
i
ndi
amar
t
.
c
om/pr
oddet
ai
l
/l
abor
at
or
y-ph-met
er
-15063679812.
ht
ml
ht
t
ps
:
//c
ommons
.
wi
ki
medi
a.
or
g
/wi
ki
/Fi
l
e:
Mag
net
i
c
_S
t
i
r
r
er
.
JPG
ht
t
ps
:
//www.
wal
l
paper
fl
ar
e.
c
om/four
-c
l
ear
-g
l
as
s
-l
abor
at
or
y-equi
pment
s
-ex
per
i
ment
-s
c
i
enc
e-c
hemi
s
t
r
ywal
l
paper
-wmg
no
ht
t
ps
:
//www.
nj
i
t
.
edu/pr
ec
ol
l
eg
e/s
i
t
es
/nj
i
t
.
edu.
pr
ec
ol
l
eg
e/fi
l
es
/S
ol
ubi
l
i
t
y%20%26%20Buffer
s
%20
-%20Lab-r
epor
t
-for
mat
.
pdf