Water Nuggets Practice Exam 2025 – Complete Study Resource

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What change occurs to a solution when it becomes more acidic?

The more basic the solution

The more neutral the solution

The more hydroxide ions

The more hydronium ions

When a solution becomes more acidic, there is an increase in the concentration of hydronium ions (H₃O⁺) in the solution. The acidity of a solution is measured by its pH level, where lower pH values indicate higher acidity. This increase in hydronium ions occurs due to the dissociation of acids in water, which releases hydrogen ions (H⁺) that combine with water molecules to form hydronium ions.

In a more acidic solution, the high concentration of hydronium ions is what leads to the characteristic properties of acids, such as a sour taste or the ability to conduct electricity better than neutral or basic solutions. Thus, when a solution becomes more acidic, it directly translates to a greater number of hydronium ions present, confirming that the correct answer is indeed related to the increase in these specific ions.

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