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The ionization constant of formic acid i...

The ionization constant of formic acid is `1.8xx10^(-4)`. Around what pH will its mixture with sodium formed give buffer solution of higher capacity. Calculate the ratio of sodium formate and formic acid in a buffer of `pH 4.25`.

Text Solution

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Form eq (i), we get `4.25 = 3.74 + log .(["HCOONa"])/(["HCOOH"]) `
` (["HCOONa"])/(["HCOOH"]) = " anti log " (4.25 - 3.74 ) = 3.24 `
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