The weight of CH(3)COONa needed to ad...

The weight of `CH_(3)COONa` needed to add in 1 litre N/10 `CH_(3)COOH` to obtain a buffer solution of pH value 4 is ( Given `K_(a) = 1.8 xx10^(-5)` )

A

`1.2 ` g

B

` 1.47` g

C

` 1.8` g

D

4 g

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