What Is the Hydronium-Ion Concentration of a 0

question 49

Multiple Choice

What is the hydronium-ion concentration of a 0.25 M solution of HCN (K_a = 4.9 × 10^-10) at 25°C?

• A) 1.6 × 10^-4 M
• B) 3.3 × 10^-6 M
• C) 2.1 × 10^-6 M
• D) 1.1 × 10^-5 M
• E) 4.4 × 10^-5 M

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