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What is the pKa value of citric acid?

A:

Quick Answer

The pKa value of an acid is used to determine the ability of an acid to donate protons in chemical reactions. Weak acids such as citric acid have a high pKa. The pKa of citric acid is 6.5.

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Full Answer

Citric acid occurs in large amounts naturally in citrus fruits. It is used to add a sour taste to food and drinks. It is used to soften water, which makes it useful in manufacturing soaps and cleaning agents. It is a chelating agent that is useful in cleaning limescale in boilers. Citric acid can be used successfully as an alternative to nitric acid in the passivation of stainless steel.

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