Question

What happens to the concentration of H+ ions when a dilute acid is added to water

Answer 1

The concentration decreases because of the fact , that when water is added to a solution ,the ratio of amount of solute to the amount of water decreases.

This can be understood in a simple way, If you have 1 litre of water and add one gram of salt. The concentration of salt in solution will be 0.001 gram per ml. But when you add more water to this solution, say 1 litre . The amount of water in the solution will become 2 litre and concentration will decrease to 0.0005 gram per ml.

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Answer 2

When dilute acid is added to the water the concentration of H+ ions increases and the pH value decreases which increases the acidity. The H+ ions produces in this way combines with water to form H3O+or hydronic ions.

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