Answer to Question #214404 in General Chemistry for Delancy

Question

1.    For each word equation below provide the skeleton equation; then balance the skeleton equation. Remember to include all the states of matter.

 

a)   methane + oxygen → carbon dioxide + water

 

skeleton equation:

 

balanced equation:

 

b)   sodium + chlorine → sodium chloride

 

skeleton equation:

 

balanced equation:

 

c)    iron(II) oxide → iron + oxygen

 

skeleton equation:

 

balanced equation:

 

d)   cupric oxide → copper + oxygen

 

skeleton equation:

 

balanced equation:

 

e)   calcium + water → calcium hydroxide + hydrogen gas

 

skeleton equation:

 

balanced equation:

 

Answer 1

a) Skeleton :CH4 + O2 --> CO2 + H2O

Balanced:CH4 +2 O2 --> CO2 +2 H2O

b) Skeleton :Na(s)+Cl2(g) → NaCl(s)

Balanced :2Na(s)+Cl2(g) → 2NaCl(s)

c) Skeleton :Fe+ O2 → Fe2O.

Balanced :4Fe+ 3O2 → 2Fe2O.

d) Skeleton :CuO - - >Cu(s) +O2(g)

Balanced :2CuO - - >2Cu(s) +O2(g)

e) Skeleton :Ca(s) +H2O→Ca(OH)2+H2

Balanced :Ca+2H2O→Ca(OH)2+H2