Starter Question
2.
Zn
+ I2reaction
→ ZnI2 between gold and oxygen possible? Explain your
3.
Is
the
1.
2NaOH
+ H2SO
4 → Na
2aSO
4 + 2H2Oreaction.
Zinc
reacts
with
iodine
in
synthesis
3 of 0.2mol/l sulfuric acid exactly neutralises a quantity
answer.
20cm
a) Determine the theoretical yield if a 125.0g sample of zinc was
of 0.5mol/l sodium hydroxide solution. What volume of alkali
used.
must have the
been
reacted? yeild if 515.6g product is recovered.
b) Determine
percentage
2. Zn + I2 → ZnI2
Zinc reacts with iodine in a synthesis reaction.
a) Determine the theoretical yield if a 125.0g sample of zinc was
used.
b) Determine the percentage yeild if 515.6g product is recovered.
3. Is the reaction between gold and oxygen possible? Explain your
answer.
Exit Ticket
1. 0.24 moles of a salt is dissolved to make 1.2l of solution.
the
then
hand
in. IfWhen
you have
What
is solutions
the
concentration
of the
solution?
2.Answer
3.
Aqueous
Predict
iffollowing
the
following
ofquestions
aluminum
reaction
chloride
will
occur.
and
sodium
it does
completed
tasks
youfor
may
pack
up aluminum
hydroxide
write aboth
balanced
are these
mixed,
equation
forming
the
the
precipitate
reaction
a balanced
ionictoequation
forofthis
reaction
Cl2is(g)dissolved
+ HF(aq)
→make 1.2l
1. hydroxide.
0.24 molesWrite
of a salt
solution.
What is the concentration of the solution?
2. Aqueous solutions of aluminum chloride and sodium
hydroxide are mixed, forming the precipitate aluminum
hydroxide. Write a balanced ionic equation for this reaction
3. Predict if the following reaction will occur. If it does
write a balanced equation for the reaction
Cl2(g) + HF(aq) →
The Gas Laws
You need to know about 5 of these laws
Boyle’s Law
Charles’s Law
Gay- Lussac’s Law
and finally
The Ideal Gas Law
Combined Gas Law
Boyle’s Law
•Named after Robert Boyle
•One of the founders of modern
Chemistry
Boyles Law states that for a given
mass of a gas, at constant
temperature, pressure and volume
are inversly proportional
P1V1 = P2V2
Charles’s Law
•This law is credited to Jacques Charles
•Invented the hydrogen filled balloon for
air travel, think blimps
Charles’s law states that at constant
pressure the volume of a gas increases as
temperature increases
V1T2 = V2T1
Gay- Lussac’s Law
•This law is named after Joseph Louis
Gay- Lussac
•Co discovered Boron and
recognised iodine as a separate
element
This law states that if the volume of
a gas remains constant then the
pressure is directly proportional to
the temperature
P1T2 = P2T1
Combined Gas Law
As is suggested by the name this law combines each of the
previous ones into one rule
P1V1 = P2V2
T1 T2
NB: For all gas law calculations temperature must be in
Kelvin and volume in litres.
The Ideal Gas Law
This law combines Boyle’s and Charles’s Law with
Avogadro’s Law
Avogadro’s Law states that if two gases have the same
pressure and temperature then equal volumes of the two
gases will have the same number of molecules.
pressure
PV = nRT
temperature, K
gas constant
volume
number of
moles
Now try the following problems
oCin
oC.at
4.
helium
filled
balloon
sea level
has
a volume
of 2.1l
3.
2.
1.A
The
AThe
gas
pressure
volume
at 89
of
occupies
an
a gas
automobile
atat
a99.0kPa
volume
tire
isof300ml.
is0.67l.
1.88atm
At
If the
what
at pressure
25.0
What
is
0.998
36othe
C.ifIfvolume
it istemperature
released
andto
rises
toupantoelevation
will
temperature
increased
beatm
the and
pressure
to will
188kPa,
the
what
will
increase
be the
new
warms
1.12l?
volume?
37.0oC at
which the pressure is 0.900 atm and the temperature is 28oC,
what
theoCnew
volume
of the balloon?
2. Awill
gas be
at 89
occupies
a volume
of 0.67l. At what
temperature will the volume increase to 1.12l?
3. The pressure in an automobile tire is 1.88atm at 25.0oC. What
will be the pressure if the temperature warms up to 37.0oC
4. A helium filled balloon at sea level has a volume of 2.1l at
0.998 atm and 36oC. If it is released and rises to an elevation at
which the pressure is 0.900 atm and the temperature is 28oC,
what will be the new volume of the balloon?
Today’s Task
Complete the gas law worksheet