Question

The reaction between Barium chloride and Sodium sulfate goes to completion because?

• A. The reaction is irreversible
• B. Barium sulphate is almost insoluble
• C. The solubility of barium chloride decreases
• D. Both A and B

Answer 1

The correct option is D

Both A and B

Explanation for correct answer:-

Option (D) Both A and B

• Reaction between barium chloride and sodium sulphate is an example of double displacement reaction and also the reaction is exothermic.
• On mixing a solution of barium chloride with sodium sulphate, a white precipitate of Barium sulphate is immediately formed, which is an insoluble product and as we can see that the reaction is irreversible.
• These reactions are ionic in nature and therefore the reactants change into ions when dissolved in water and exchange of ions takes place in solution.
  $\underset{\left(Sodiumsulphate\right)}{N{a}_{2}S{O}_{4\left(aq\right)}}+\underset{\left(Bariumchloride\right)}{BaC{l}_{2\left(aq\right)}}\to \underset{\left(Bariumsulphate\right)}{BaS{O}_{4\left(s\right)}}+\underset{\left(Sodiumchloride\right)}{2NaCl}$
• Thus, the reaction between Barium chloride and Sodium sulphate goes to completion because barium sulphate is almost insoluble and the reaction is irreversible.

Explanation for incorrect answer:-

Option (C) The solubility of barium chloride decreases

• Although Barium Chloride is a strong electrolyte, it is sparingly soluble in water.
• Hence it is the incorrect option

Thus, the reaction between Barium chloride and Sodium sulfate goes to completion because the reaction is irreversible and Barium sulphate is almost insoluble.