Translate the following statements into chemical equations and then balance them.
(a) Hydrogen gas combines with nitrogen to form ammonia.
(b) Hydrogen sulphide gas burns in air to give water and sulpur dioxide.
(c) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
(d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
Answer:
(a) Hydrogen gas combines with nitrogen to form ammonia.
Word Equation:
Hydrogen + Nitrogen → Ammonia
Balanced Chemical Equation:
N2 + 3H2 → 2NH3
(b) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
Word Equation:
Hydrogen sulphide + Oxygen → Water + Sulphur dioxide
Balanced Chemical Equation:
2H2S + 3O2 → 2H2O + 2SO2
(c) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
Word Equation:
Barium chloride + Aluminium sulphate → Aluminium chloride + Barium sulphate (↓)
Balanced Chemical Equation:
3BaCl2 + Al2(SO4)3 → 2AlCl3 + 3BaSO4↓
(d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
Word Equation:
Potassium + Water → Potassium hydroxide + Hydrogen
Balanced Chemical Equation:
2K + 2H2O → 2KOH +H2↑