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What is the pH of a 0.05 M solution of f...

What is the pH of a 0.05 M solution of formic acid? `(K_(a)=1.8xx10^(-4))`

Text Solution

Verified by Experts

`[H^(+)]=sqrt(K_(a)*c)=sqrt(1.8xx10^(-4)xx0.05)=3.00xx10^(-3)"mol"dm^(-3)`
`pH=-log[H^(+)]=-log(3.0xx10^(-3))=2.52`.
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