Question

An aqueous solution turns red litmus solution blue. Excess addition of which solution would reverse the change-ammonium hydroxide solution or hydrochloric acid?

September 22, 2024

Answer

To reverse the change of an aqueous solution that turns red litmus blue, you would add hydrochloric acid.

Here’s why:

– The solution that turns red litmus blue is basic (alkaline).

– Ammonium hydroxide is also a base, which would not reverse the change.

– Hydrochloric acid is an acid, which can neutralize the base and turn the solution acidic again, causing the litmus paper to turn red once more.

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