Question

What is the hydronium-ion concentration in a solution resulting from mixing 173 mL of 0.100 M HCN and 73 mL of 0.100 M KOH at 25ºC? Ka for HCN = 4.9 x10-10 at 25ºC.
A) 4.5 x10-6M
B) 7.0 x10-6M
C) 3.4 x10-13M
D) 6.7 x10-10M
E) 1.0 x10-13M

Answer

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