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Not necessarily, if a solution of a strong acid is very dilute it will have a higher pH than some weak acids in higher concentrations.

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13y ago
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14y ago

The pH measures the level of acidity or alkalinity. Of course they change the pH!

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13y ago

Yes they do change (lower) pH of water (< 7.0) though not as much as strong acids (same amount) can.

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12y ago

Yes. When you add water to an acid/base, you are diluting the solution and the acid/base is less concentrated, changing the pH to make it a bit more neutral.

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15y ago

Yes

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Q: Does weak acid always act to change the pH when placed in water?
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