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The `pK_(a)` of acetic acid and `pK_(b)` of ammonium hydroxide are `4.76` and `4.75` respectively. Calculate the pH of ammonium acetate solution.

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The `pK_(a)` of acetic acid and `pK_(b)` of ammonium hydroxide are `4.76` and `4.75` respectively. Calculate the pH of ammonium acetate solution.
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As `CH_(3)COONH_(4)` is a salt of weak acid and weak base,
`pH =7+1/2[pK_(a)-pK_(b)]`
`=7+1/2(4.76-4.75)`
`=7+0.005=7.005`
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