The pH of a buffer solution changes from 6.20 to 6.17 when 0.003 mole of acid is added to 500 mL of the buffer. The buffer capacity of the system is, therefore,

Q. When

0.002

mol of acid is added to

250

mL of a buffer solution,

p H

decreaes by

0.02

units.

The buffer capacity of the system is:

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When 2 mol of HCI is added to IL of an acidic buffer, its pH changes from 3.4 to 2.9. The buffer capacity of the buffer solution is

The correct option is C 4Buffer capacity =Numberofmolesofacidorbaseaddedtoa1LbufferChangeinpH=23.4−2.9=4

When $2$ mol of $H C I$ is added to $I L$ of an acidic buffer, its $p H$ changes from $3.4$ to $2.9$ . The buffer capacity of the buffer solution is

The correct option is C $4$
Buffer capacity $= \frac{N u m b e r o f m o l e s o f a c i d o r b a s e a d d e d t o a 1 L b u f f e r}{C h a n g e i n p H} = \frac{2}{3.4 - 2.9} = 4$