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 + O_{2
water (yields) hydrogen + oxygen}

b) KOH + HCl à KCl + H₂O
_{potassium hydroxide + hydrochloric acid (yields) potassium chloride + water}

c) NaHCO₃ à H₂O + CO₂ + Na₂CO_{3
sodium bicarbonate (yields) water + carbon dioxide + sodium carbonate
(baking soda)}

d) FeS + 2HCl à H₂S + FeCl_{2
iron sulfide + hydrochloric acid (yields) hydrogen sulfide + iron chloride}

e) Mg + O2 à MgO
_{magnesium + oxygen (yields) magnesium oxide}

f) K + H₂O à KOH + H_{2
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 + O_{2
carbon dioxide + water (yields) sugar + oxygen}

j) Fe + O₂ à Fe₂O_{3
iron + oxygen (yields) iron oxide}

k) N₂ + H₂ à NH_{3
nitrogen + hydrogen (yields) ammonia}

l) Cu₂O + C à Cu + CO_{2
copper oxide + carbon (yields) copper + carbon dioxide}