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What Is the Hydronium-Ion Concentration in a Solution Resulting from Mixing

Question 4

Multiple Choice

What is the hydronium-ion concentration in a solution resulting from mixing 133 mL of 0.100 M HCN and 80 mL of 0.100 M KOH at 25°C? Ka for HCN = 4.9 × 10-10 at 25°C.


A) 3.5 × 10-6 M
B) 7.0 × 10-6 M
C) 2.7 × 10-13 M
D) 3.2 × 10-10 M
E) 1.0 × 10-13 M

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