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A solution contains 60 mL of 0.1 M NH(4)...

A solution contains `60 mL` of `0.1 M NH_(4)OH` and `30 mL` of `0.1 MHCl`. The `P^(H)` of the resulting mixture is
(Given `K_(b)` of `NH_(4)OH = 1.8 xx 10^(-5)`,
`1.8 = 0.2553`)

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