Write a balanced chemical equation with state symbols for the following reactions.
Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s) + 2NaCl(aq)
Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.
NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)
Explanation
The answers are derived by first translating the reaction names into chemical formulae using the symbols found in the practice questions of the context (e.g., BaCl₂, Na₂SO₄, NaOH). The equations are then balanced to ensure the number of atoms of each element is equal on both sides, following the law of conservation of mass. Finally, state symbols are added based on the context's definitions: (aq) for aqueous solutions, (s) for insoluble solids (precipitate), and (l) for water in liquid form.