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Which of the following will decrease the percentage ionization of 1.0 M acetic acid, CH3CO2H(aq)?

a. Chlorinating the CH3 group
b. Diluting the solution
c. Adding concentrated HCL(aq)
d. Adding a drop of basic indicator

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ebrightosagie

Answer: C. Adding concentrated HCL(aq)

Explanation:

HCl is an efficient acid that will increase the quantity of H+ in the solution and thus reduce the ionizing percentage of Ch3CO2H. The amount of ionization of the latter would be reduced by the addition of strong acid to a solution of weak acid.

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