Chemical Equations – Chapter 7 – Quiz Questions #2
1.What is a CHEMICAL EQUATION?
2.What is a COEFFICIENT?
3.What is a SUBSCRIPT?
4.Balance the following chemical equations:
a) H2O à H2 + O2
water (yields) hydrogen + oxygen
b) KOH + HCl à KCl + H2O
potassium hydroxide + hydrochloric acid (yields) potassium chloride + water
c) NaHCO3 à H2O + CO2 + Na2CO3
sodium bicarbonate (yields) water + carbon dioxide + sodium carbonate
(baking soda)
d) FeS + 2HCl à H2S + FeCl2
iron sulfide + hydrochloric acid (yields) hydrogen sulfide + iron chloride
e) Mg + O2 à MgO
magnesium + oxygen (yields) magnesium oxide
f) K + H2O à KOH + H2
potassium + water (yields) potassium hydroxide + hydrogen
g) CuCl2 + Al à AlCl3 + Cu
copper chloride + aluminum (yields) aluminum chloride + copper
h) CH4 + O2 à CO2 + H2O
methane + oxygen (yields) carbon dioxide + water
i) CO2 + H2O à C6H12O6 + O2
carbon dioxide + water (yields) sugar + oxygen
j) Fe + O2 à Fe2O3
iron + oxygen (yields) iron oxide
k) N2 + H2 à NH3
nitrogen + hydrogen (yields) ammonia
l) Cu2O + C à Cu + CO2
copper oxide + carbon (yields) copper + carbon dioxide