InterviewSolution
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InterviewSolution
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A buffer solution is one which hasA. reserved acidB. reserved baseC. reserved acid and reserved baseD. pH equal to 7 |
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Answer» Correct Answer - C A buffer is a solution characterized by the ability to resist changes in pH when limited amounts of acid or base are added to it. If `0.01` mol of hydrochloric acid is added to 1 L of pure water, the pH decreases form `7.0` to `2.0-a` pH change of `5.0` units. By contrats, the addition of this amount of hydrolichloric acid to 1 L of buffered solution might change the pH only `0.1` unit. A buffer solution resists changes in pH through its ability to combine with both `H^(+)` and `OH^(-)` ions. The reseverd base of buffer neutralizes the added `H^(+)` ions while the reserved acid of buffer neutralizes the added `OH^(-)` ions. |
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