Download Balancing Equations

 Chemical
rnx (reaction)
Baking a cake or burning wood
Vs
Water to Ice
What is
Water to Vapor (boiling water)
 This
law states matter can neither be
created or destroyed only converted.
 (all
words) Solid ammonium chromate when
heated decomposes into ammonia gas and
solid Chromate while giving off energy.
(NH4)2(CrO4)(s)
(NH4)(g) + CrO4 (s)
The break down:
Symbols
“+” separates products or separates reactants
 yield, make; separates products from
reactants. Points to product. (direction of rnx)
g= gas or vapor
l=pure liquid
aq= aqueous solution; dissolved into water; all
acids are aqueous.
s= solid
Nitrogen gas reacts with hydrogen gas form
ammonia vapor.
N2 (g) + H2 (g)  ___ (g)
N2 (g) + H2 (g)  NH3(g)
N2 + 3H2  2NH3
(g)
(g)
Coefficients
(g)
What is special
about the
coefficient in front
of the Nitrogen
gas?
CH4 + 2O2
C=1
H=4
 CO2 +2H2O
2(O=2)=4
C=1 2(H=2)=4
O=2
2(O=1)=2
O=4
CuSO4 + Al  Al2(SO4)3 + Cu
OR
Na + H2O  NaOH + H2
**Hint----- Balance Hydrogen's Last
CuSO4 + Al  Al2(SO4)3 + Cu
Cu=1
Cu=1
S=1
S=3
O=4
O=12
Al=1
Al=2
3CuSO4 + 2Al  Al2(SO4)3 + 3Cu
Na + H2O  NaOH + H2
Na=1
Na=1
O=1
O=1
H=2
H=3
2Na + 2 H2O  2NaOH + H2