Write a balanced chemical equation with state symbols

Write a balanced chemical equation with state symbols for the following reactions.

(i) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
(ii) Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.

Answer:

(i)

Barium chloride solution + Sodium sulphate solution → Barium sulphate (insoluble) + Sodium chloride solution

BaCl₂ (aq) + Na₂SO₄ (aq) → BaSO4 (s) + 2NaCl (aq)

• (aq) = aqueous (dissolved in water)

• (s) = solid (precipitate)

(ii)

Sodium hydroxide solution + Hydrochloric acid solution → Sodium chloride solution + Water

NaOH (aq) + HCl (aq) → NaCl (aq) + H₂O (l)

• (aq) = aqueous

• (l) = liquid