A 1.00 liter solution contains 0.50 M acetic acid and 0.38 M potassium acetate I

Question

A 1.00 liter solution contains 0.50 M acetic acid and 0.38 M potassium acetate If 25.0 mL of water are added to this system, indicate whether the following statements are true or false. (Note the the volume MUST CHANGE upon the addition of water) A. The concentration of CHCOOH will decrease. B. The concentration of CHyCOO will increase C. The equilibrium concentration of Hy0' will decrease. D. The pH will increase. ?E. The ratio of [CHCOOH) / [CH3COO. ] will decrease. Submit Answr Rutry Entire Group 9 more group attompts romaining 2:04 ??? SAMSUNG ?11

Explanation / Answer

Addition of water dilutes the solution thereby decreasing the concentration of both acetic acid and potassium acetate. Dilution increases the dissociation (dissociation constant) of acetic acid causing an increase in H3O+ concentration but the pH of the solution decreases. Acetic acid being a weak acid undergoes only partial dissociation whereas potassium acetate being a salt exist as potassium and acetate ions. Thus concentration of these ions decreases on dilution..

A. True

B. False

C. False

D. True

E. True

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