The dissociation constant of a week acid...

The dissociation constant of a week acid is `1xx10^(-3)`. In order to prepare a buffer solution and with a `pH=4`, the `["Acid"]//["Salt"]` ratio should be

A

`4:3`

B

`3:4`

C

`10:1`

D

`1:10`

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The correct Answer is:

D

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