Question detail
When a strong acid is diluted, how does the pH change compared to a weak acid being diluted? Explain your reasoning.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Reactions of acids
Question
When a strong acid is diluted, how does the pH change compared to a weak acid being diluted? Explain your reasoning.
Answer
When a strong acid is diluted, the pH increases significantly because strong acids fully ionize in solution, leading to a rapid decrease in hydrogen ion concentration. In contrast, a weak acid only partially ionizes, so its pH changes more gradually upon dilution.
Explanation
This question tests the understanding of the difference in ionization between strong and weak acids and how it affects pH during dilution. It requires students to apply their knowledge of acid behavior in solutions.
Common mistake
Misunderstanding pH Changes
Students often believe that diluting a strong acid will change its pH more significantly than diluting a weak acid.
Emphasize that while both strong and weak acids will have their pH increase upon dilution, the strong acid will still remain at a lower pH compared to the weak acid after dilution.
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