Posted by **khin** on Thursday, May 13, 2010 at 6:13am.

Chloroacetic acid has a relatively large equilibrium constant, so at low acid concentrations it is necessary to use the quadratic equation in order to calculate the concentrations of the aqueous species. Ka for ClCH2COOH is 1.4 ยด 10-3. For the problems that follow, consider one liter of a solution that originally had 0.0200 mol of chloroacetic acid.

What is the equilibrium concentration of [ClCH2COOH]?

a. 0.010

b. 0.012

c. 0.015

d. 0.017

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