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Calmacil · 01-25-2011, 01:49 PM

what is the approximate pH of a 0.1M solution of the salt NH4CI?

answer is 5.0, but why isnt it 1.0?

Oromendil · 01-25-2011, 01:50 PM

NH4Cl dissociates into --< NH4+ + Cl-

The NH4+ ion is the conjugate acid of a strong base, NH3, and is therefore a weak acid
The presence of the ion causes the solution to be slightly more acidic than neutral, accounting for the pH of 5.0

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