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Which of the following is a substance that can moderate the change in pH of a solution? Which of the following is a substance that can moderate the change in pH of a solution? Peptide Polar compound Buffer Enzyme

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Answer: C. Buffer

Explanation: A buffer solution is a aqueous solution containig a mixture of a weak acid and its conjugated base or a weak base and its conjugated acid. These buffer solutions can moderate the change in pH by neutralizing little quantities of strong acids or bases.

For example: Bicarnonate buffer systems that regulates the blood pH:

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