Chemistry
An 0.0284 aqueous solution of lactic acid is found to be 6.7% ionized. Determine Ka for lactic acid.
HC3H5O3 + H2O H3O^+ + C3H5O3^- Ka =?
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Answers
Ka for lactic acid can be calculated using the equation:
Ka = [H3O+]*[C3H5O3-] / [HC3H5O3]
Given:
[H3O+] = 6.7% = 0.067
[C3H5O3-] = 6.7% = 0.067
[HC3H5O3] = 0.0284
Ka = 0.067 * 0.067 / 0.0284 = 0.239
