Question

How is the concentration of hydronium ions (H₃O⁺) affected when the solution of an acid is diluted?

Answer 1

1. When an acid solution is diluted by adding water, the concentration of hydronium ions (H₃O⁺) decreases.
2. This happens because the number of H₃O⁺ ions remains the same, but the total volume of the solution increases.
3. Since concentration is defined as moles of solute per litre of solution, increasing the volume lowers the concentration.