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Calculate the pH of the solution in whic...

Calculate the pH of the solution in which `0.2 M NH_(4)Cl` and `0.1 M NH_(3)` are present. The `pK_(b)` of ammonia solution is `4.75`.

Text Solution

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The correct Answer is:
9
`pOH=pK_(b)+log.(["Salt"])/(["Base"])`
`=4.75+log.(0.2)/(0.1)=4.75+log2`
`=4.75+0.3010~=5.0`
`:. pH=14-5.0=9`
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