Balancing Equations. Chemical vs Physical changes. Chemical rnx (reaction) Baking a cake or burning wood Vs Water to Ice What is Water to Vapor (boiling water). Law of conservation of matter. This law states matter can neither be created or destroyed only converted. Word equation.
Baking a cake or burning wood
Water to Ice
Water to Vapor (boiling water)
(NH4)2(CrO4)(s) (NH4)(g) + CrO4 (s)
The break down:
“+” separates products or separates reactants
yield, make; separates products from reactants. Points to product. (direction of rnx)
g= gas or vapor
aq= aqueous solution; dissolved into water; all acids are aqueous.
Nitrogen gas reacts with hydrogen gas form ammonia vapor.
N2 (g) + H2 (g) ___ (g)
N2 (g) + H2 (g) NH3(g)
N2(g) + 3H2 (g) 2NH3(g)
What is special about the coefficient in front of the Nitrogen gas?
CH4 + 2O2 CO2 +2H2O
C=1 2(O=2)=4 C=1 2(H=2)=4
H=4 O=2 2(O=1)=2
CuSO4 + Al Al2(SO4)3 + Cu
Na + H2O NaOH + H2
**Hint----- Balance Hydrogen\'s Last
3CuSO4 + 2Al Al2(SO4)3 + 3Cu
2Na + 2 H2O 2NaOH + H2