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October 25, 2014

Homework Help: chem

Posted by Natash on Wednesday, May 13, 2009 at 10:07pm.

the pH of a .100 M solution of sodium formate = 8.37. Calculate the value of Ka of formic acid.

okay so I know that the anion of a weak acid is itself a weak base

so A- +H2O---> OH- + HA

pOH =14-8.37 so conc of OH is 10^-5.63

Ka=[OH][HA]/[A-] so we know the conc of OH and A- and then im stuck helppp

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