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50 mL of 0.1 M solution of sodium aceta...

`50 mL` of `0.1 M` solution of sodium acetate and `50 mL` of `0.01 M` acetic acid mixed. The `pK_(a)` of acetic acid is `4.76`. The `P^(H)` of the buffer solution is

A

`4.26`

B

`5.76`

C

`3.76`

D

`4.76`

Text Solution

Verified by Experts

The correct Answer is:
D
`"Meq of "CH_(3)COOH=100 xx0.1xx1=10`
`" Meq of " CH_(3)COONa = 50xx 0.2 xx 1 = 10`
`pH=pK_(a)+log. ([CH_(3)COO^(-)])/([CH_(3)COOH])`
`pH=4.76+log. 10/10`
`pH=4.76+log 1`
`pH=4.76`
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