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? K_a 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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Definitions:

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