InterviewSolution
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InterviewSolution
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The `P^(H)` of a buffer solution is `5`. It consists of a weak acied `HA` and its conjugate base `A^(-)`. `P^(K_(a))` of `HA` is `4.699`. Which of the following is correct combination of solutions present in the buffer solution?A. `100 mL` of `1.1 M HA` and `200 mL` of `0.1 MA^(-)`B. `200 mL` of `0.1M HA` and `100 mL` of `0.1 MA^(-)`C. `100 mL` of `0.1M HA` and `200 mL` of `0.2 MA^(-)`D. `100 mL` of `0.2M HA` and `200 mL` of `0.1 MA^(-)` |
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Answer» Correct Answer - A for an acidic buffer `:. P^(H) = P^(ka) + "log" (["salt"])/(["acid"])` `5 = 4.699 + "log" (["salt"])/(["acid"])` `0.310 = "log"(["salt"])/(["acid"])` `(["salt"])/(["acid"]) = 2` `(200 xx 0.1)/(100 xx 0.1) = 2` |
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