Question

What is the hydronium ion concentration of a 0.100 M acetic acid solution with a Ka = 1.8 10-5? The equation for the dissociation of acetic acid is:
CH3CO2H(aq) + H2O(l) H3O+(aq) + CH3CO2-(aq).
A) 1.3 10-2 M
B) 4.2 10-2 M
C) 1.3 10-3 M
D) 4.2 10-3 M

Answer

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