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What will be the volume of pH of 0.01 mo...

What will be the volume of `pH` of `0.01` mold`m^(-3)`
`CH_(3)COOH(K_(a) = 1.74 xx 10^(-5))`

A

`3.4`

B

`3.6`

C

`3.9`

D

`3.0`

Text Solution

Verified by Experts

The correct Answer is:
A
`K_(a) = 1.74 xx 10^(-5) `
Concentration of `CH_(3)COOH =0.01 " mol dm"^(-3)`
`[H^(+)] = sqrt(K_(a).C)`
`= sqrt(1.74 xx10^(-5) xx 0.01 )= 4.17 xx 10^(-4)`
`pH = - log [H^(+)]`
` = - log (4.17 xx 10^(-4)) = 3.4 `
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