In a basic buffer, 0.0025 mole of 'NH4 ...

In a basic buffer, 0.0025 mole of 'NH_4 Cl' and 0.15 mole of `NH_4OH` are present. The pH of the solution will be `(pK_a)=4.74`

11.04

10.24

6.62

5.48

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