CH7 Balancing Reactions
Analkaneundergoescombustionwhenitreactswithoxygentoproducecarbondioxidewaterandenergy
Oa CoatH O
alkane
energy
thereactionforthecombustion heptane
CH
Balance
t
02 a Coat He0
of
of
eavationthe
d oes
q uantity achemicalreaction
How
anonsin achemical
toBalancechemical
Eau
notarrangeThuseachside theequationmustrepresentthesame
quantity anyparticularelement
of
reaction
what
aretheproductsfromthefollowingsinglereplacement
t
nitraftaketatt.la
Z n s Cusolag 2nso andCu
compounds
mmonium
aresoluble
compounds
ofalkalimetalcationsaresoluble
anchloride
bromideandiodidecompanas
m ercury I andleadin
aresolubleexceptthoseorsilver
ansulfates
soluble
except
hose
an mercury11andlead
on
orba'Mmonium
astrontium
are
fortthose
allphosphates
ay
insoluble
cations
metal
except
alkali
and
of
for
an amidesare
insoluble
cations
b arium
metal
except
acacias
and
forthoseofammoniumalkali
on
ofcalciumstrontium
any andsuicidesare
Doublereplacementreaction
reactionbetween
union
chemical
ionsareinterchangedto
reactionsis a
replacement
twolamecompandsin
sommonewampands
adouble
ABtop Ap Bc
neutralizationreactions
replacement
precipitation
reactions
reactions
are
and
themostcommontypesofdouble
reactions
Neutralizationreactionsare
inwhichanacidandabaseinanaqueoussolutionreacttoformsaltandwater
Aan Basesalt water
HA BOH AB H2O
TheHtionsfromacidssuchashydrogenhalidesoraceticacidcatcookorHattonreactwiththeOltionsfrombasessumasmetalhydridetoform HO
reactions
precipitation
solutions
react
toforman insolublesolidwhenmixed
inwhichtwoionicsalt
TYPESOFCHEMICALREACTIONS
doubledisplacement
aB or
is areactiontwoelementsorgroupsofelementsintwodifferentcompoundsexchangeplacestoformtwonewcompands
actBD
and
is areactiononeelementdisplacesanotherin acomp
ActB
single displacement
aBto
decomposition
reaction acomplexsubstancebreaks
downintosimpler substances
toformmorecomplexsubstances
substancescombine
synthesis reaction
s impler
where
Q
whatisthecoefficientofnitrogengasafter balancingthefollowingequation
Nag t Hag
NH g 1
NOTE
tothelawofconservationofmassmattercannotbecreatedordestroyedTherefore achemicalequationmustshowthesame
numberofeachkindofatominthe
productsThebalancedequation3
reactants asitdoesinthe
HatNa 2NIt has6atomsof
hydrogen
and2atomsofnitrogenoneachsideofthearrow
According
Q ThefollowingequationisnotbalancedNasPoytMgClaMg Pal tWall
Q Whatarepredictedproductsfromthefollowing
decompositionreaction
ME
Chemicalequationsarewrittenrepresentations
Al Hoos31stH
ofchemicalreactionsForexample achemicalequationmaybe
water H2O
writtenforthereactionofhydrogengas Azwithoxygengas Oaproducingliquid
Hag
0219
Ha
OG
molesofcarbonhydrogenand
present
oxygenare
many
in a 100gsample ofascorbicacid
Q How
ascorbic
mass
son by
andsu
note
ano sampleof
acidexitc contains40.921carbon4
ssthydrogen
empiricalformula
oxygen
assumme
g
acid
ascorbic