Question

Kamla prepared aqueous solutions of barium chloride and sodium sulphate. She

weighed them separately and then mixed them in a beaker. A white precipitate

was immediately formed. She filtered the precipitate, dried it and then weighed

it again.

a. Will the weight of the dried precipitate be the same as that of the total

weight of the reactants before mixing?

b. If not, what she should have done?

c. Which law of chemical combination does this support?

d. State the law which is involved in the above experiment.​

Answer 1

Answer:

When sodium sulphate solution reacts with barium chloride solution results in double displacement reaction in which ions are exchanged.

Na

2

SO

4

+BaCl

2

⟶2NaCl+BaSO

4

In this reaction barium sulphate and sodium chloride are formed,the solution in water consists only sodium chloride because sodium chloride dissolves in water while barium sulphate it settles down and a white precipitate is formed (insoluble).

Hence, option B is correct.

Explanation:

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