The pH of a buffer is 6.745. When 0.01 moles of NaOH is added to 1 litre of it, the pH changes to 6.832. Its buffer capacity is

The pH of a buffer is 6.745. When 0.01 moles of NaOH is added to 1 litre of it, the pH changes to 6.832. Its buffer capacity is

  1. A

    0.187

  2. B

    0.115

  3. C

    0.076

  4. D

    0.896

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    Solution:

    Buffer capacity

    =No.  of moles of base added/litre of bufferChange in pH

    =0.016.832 - 6.745 = 0.010.087 = 0.115

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