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Electrolysis and Electrolytes

Buffer capaci...

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Buffer capacity of buffer containing acid with pKa = 4.75 will be highest. What is its pH value?

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Q. A buffer solution contains 0.1

M

of acetic acid and 0.1

M

of sodium acetate. What will be its

p H

p K_{a}

of acetic acid is 4.75

?

Q. Buffer capacity of acid buffer solution is more when
A)

P^{K a} = p^{H}

[S a l t] = [A c i d]

P^{K a} = 7

[H +]

P^{K a}

p K_{a}

values of acetic acid is 4.75. If the buffer solution contains

0.125 M

acetic acid and

0.25 M

sodium acetate. The

p H

of buffer solution is:

1 \times 10^{- 3}

H C l

is added to a buffer solution made up of

0.01 M

acetic acid and

0.10 M

sodium acetate. The final pH of the buffer will be: (given

p K_{a}

of acetic acid is

4.75

25^{o} C

)

Q. Assertion :In a titration of weak acid and

N a O H

, the pH at half equivalence point is

p K_{a}

Reason: At half equivalence point, it forms an acidic buffer and the buffer capacity is maximum where [acid]=[salt]

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