PKb for NH3 = 4.7. When the total conce...

`PK_b` for `NH_3 = 4.7`. When the total concentra-tion of buffering agents is 0.6 mol `L^(-1)`, the pH of buffer with `NH_3` and `NH_4CI` is 9. What is the weight of `NH_3` in the buffer solution ? log 2=0.4

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`3.4 g L^(-1)`

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