What happens when an acid or a base is mixed with water?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Decrease in the concentration of ions (H3O+/OH–) per unit volume.
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Adding water to an acid or base will change its pH.
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Water is mostly water molecules so adding water to an acid or base reduces the concentration of ions in the solution.
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When an acidic solution is diluted with water the concentration of H+ ions decreases and the pH of the solution increases towards 7.