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InterviewSolution
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In which case `pH` will not change on dilutionA. `0.01 M CH_(3)COONa+0.01 M CH_(3)COOH` bufferB. `0.01 M CH_(3)COONH_(4)`C. `0.01 M NaH_(2)PO_(4)`D. in all cases |
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Answer» Correct Answer - D Mixture of sodium acetate and acetic acid is a buffer of `pH` value equal to `pK_(a)` so its buffer capacity is very high and hence its `pH` will not change signficantly while `CH_(3)COONH_(4)` is a salt of weak acid `CH_(3)COOH` and weak base `NH_(4)OH` whose magnitude of `K_(a)` and `K_(b)` are equal. So its `pH` does not depend upon concentration. Furthermore, `NaH_(2)PO_(4)` is , in fact, a single solute buffer |
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