Chemguide: Core Chemistry 14 - 16

Answers to Set 3 of the equations problems

Word equation:

sodium carbonate + hydrochloric acid (HCl)    sodium chloride + carbon dioxide + water

Convert to symbols:

Na₂CO₃ + HCl    NaCl + CO₂ + H₂O

Balanced equation:

Na₂CO₃ + 2HCl    2NaCl + CO₂ + H₂O

Word equation:

sodium + chlorine    sodium chloride

Convert to symbols:

Na + Cl₂    NaCl

Balanced equation:

2Na + Cl₂    2NaCl

Word equation:

magnesium + copper(II) oxide    magnesium oxide + copper

Convert to symbols:

Mg + CuO    MgO + Cu

Balanced equation:

The equation is already balanced.

Word equation:

sodium hydroxide + sulfuric acid (H₂SO₄)    sodium sulfate + water

Convert to symbols:

NaOH + H₂SO₄    Na₂SO₄ + H₂O

Balanced equation:

2NaOH + H₂SO₄    Na₂SO₄ + 2H₂O

Word equation:

copper(II) oxide + hydrochloric acid (HCl)    copper(II) chloride + water

Convert to symbols:

CuO + HCl    CuCl₂ + H₂O

Balanced equation:

CuO + 2HCl    CuCl₂ + H₂O

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