How to prepare a citric acid solution of pH 2.5 and 3 from 100% citric acid powder?

12 March 2020 1 6K Report

I have to extract pectin from agricultural residues with citric acid of pH 2.5 and 3 from citric acid powder, I would like to know how to prepare the citric acid solution, since the Citric acid has three pKa.

Vipul Batra

You might need HCl to bring pH down to 2.5 because the citric acid is a weak acid with a Sorensen pH range between 3-6

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