Question

When the substance ‘A’ is added to a solution of BaSO₄, a yellow precipitate is formed.

1. What do you think substance A is likely to be?
2. Name the precipitate.
3. Which type of reaction is this?

Answer 1

(a) The substance 'A' is potassium chromate (K₂Cr0₇)·

(b) The name of the yellow precipitate is barium chromate (BaCr0₄).

(c) The type of chemical reaction is double displacement.