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Higher the amount of acid or base used to product a deinite change of pH in a buffer solution, higher will be its buffe capacity. Buffer capcity of solution is maximum under the following conditions [Salt] = [Acid](in acid buffer) [Salt] = [Base] (in base capacity] pH of buffer solution lies inthe range given below `pH = pH_(a) +-1` In other words,any buffer solution can be used as buffer up to two pH units only, depending upon the value of `pK_(a)` or `pK_(b)`. A buffer is said to be efficient when `pH = pK_(a)` or `pOH = pK_(b)` Which among the following solution will the most efficient bufferA. `0.1M CH_(32)COONa + 0.01M CH_(3)COOH`B. `0.1M NH_(4)Cl + 0.1MNH_(4)OH`C. `0.001M HCOOH+ 0.002M HCOONa`D. All the above |
Answer» Correct Answer - B | |