Question

Reaction between barium chloride and sodium sulphate goes to completion because?
This question has multiple correct options.
(A) Barium sulphate is almost insoluble
(B) The reaction is reversible
(C) The solubility of barium chloride decrease
(D) The reaction is irreversible

Answer 1

Hint: In order to answer this question, you need to recall the concept of double displacement reaction, let me help you in brief; basically it is a type of chemical reaction where two compounds react, and the cation and anions of two reactants switch places forming new products.


Complete step by step answer:
- Double displacement reactions are the chemical reactions in which one component each of both the reacting species is exchanged to form the products. During this reaction the cations and anions of two different compounds change its places with each other, forming two different compounds.
- These reactions take place in aqueous solutions in which the ions precipitate. These reactions can be further classified as neutralization and gas formation reactions.
- Reaction between barium chloride and sodium sulphate is an example of double displacement reaction.
- 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. Therefore the reactants change into ions when dissolved in water and exchange of ions takes place in solution.
$$N{a}_{2}S{O}_{4(aq)}+BaC{l}_{2(aq)}\to BaS{O}_{4(s)}+2NaCl$$
- Therefore, reaction between barium chloride and sodium sulphate goes to completion because barium sulphate is almost insoluble and the reaction is irreversible.


- Hence, option A and D are the required answers.



Note: Note that all barium salts are poisonous, for instance barium carbonate will dissolve in stomach acid. It can cause gastrointestinal side effects including nausea, vomiting, and diarrhea. So make sure that the usage of barium sulphate is infrequent and usually mild.