Question

an aqueous solution of sodium bicarbonate is dilute its pH (a) increase (b) decrease (c)remains the same (d) cannot be predicted

Answer 1

i think option (b) is correct otherwise check my answer

Answer 2

An aqueous solution of sodium bicarbonate is dilute its pH is increases.

Option: (a)

Explanation:  

• Since sodium bicarbonate is an ionic substance, on making an aqueous solution of sodium bicarbonate, it divides into sodium hydroxide and carbonic acid.  

• Since carbonic acid is a weak acid but Sodium Hydroxide is a strong alkali hence the pH of the solution increases further.  

• The increase of pH is due to the increase in basicity of the solution. The presence of strongly basic substance or a basic salt makes the solution basic in aqueous medium.

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