II. Application of Concepts 2. Write the following chemical reactions including the physical states of the substances and balance chemical equations. (AS) (a) Sodium Hydroxide reacts with Hydrochloric acid to form Sodium Chloride and Water. (6) Barium Chloride reacts with liquid Sodium Sulphate to leave Barium Sulphate as a precipitate and also form liquid Sodium Chloride
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a) BaCl 2 (aq)+Na 2SO 4(aq)⟶BaSO 4 (s)+2NaCl(aq)
The solution of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
b) NaOH(aq)+HCl(aq)⟶NaCl(aq)+H 2O(l)
Sodium hydroxide reacts with hydrochloric acid to give solution of sodium chloride and water.
c) Zn(s)+2HCl(aq)⟶ZnCl 2 (aq)+H 2 (g)
Zinc pieces react with dilute hydrochloric acid to liberate hydrogen gas and zinc chloride.
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