Balancing Equations

Chemical rnx (reaction)

Baking a cake or burning wood VsWater 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 vaporl=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 (g) + 3H2 (g) 2NH3 (g)

Coefficients

What is special about the coefficient in front of the Nitrogen gas?

CH4 + 2O2 CO2 +2H2O

C=1 2(O=2)=4 C=12(H=2)=4

H=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=1S=1 S=3O=4 O=12Al=1 Al=2

3CuSO4 + 2Al Al2(SO4)3 + 3Cu

Na + H2O NaOH + H2

Na=1 Na=1O=1 O=1H=2 H=3

2Na + 2 H2O 2NaOH + H2