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What concentration of OH^(-) ions will r...

What concentration of `OH^(-)` ions will reduce `NH_(4)^(+)` ion to `2xx10^(-5)M` in `0.4M` solution of `NH_(4)OH ? K(b)(NH_(4)OH)=1.8xx10^(-5)`

A

`0.36M`

B

`0.036M`

C

`2xx10^(-5)M`

D

None of these

Text Solution

AI Generated Solution

To find the concentration of `OH^(-)` ions that will reduce `NH4^(+)` ions to `2 × 10^(-5) M` in a `0.4 M` solution of `NH4OH`, we can follow these steps: ### Step 1: Write the dissociation equation The dissociation of ammonium hydroxide can be represented as: \[ NH_4OH \rightleftharpoons NH_4^+ + OH^- \] ### Step 2: Set up initial concentrations Initially, we have: ...
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