What Is the Hydronium-Ion Concentration of a 0

question 50

Multiple Choice

What is the hydronium-ion concentration of a 0.30 M solution of HCN (K_a = 4.9 × 10^-10) at 25°C?

• A)1.7 × 10^-4 M
• B)3.4 × 10^-6 M
• C)2.2 × 10^-6 M
• D)1.2 × 10^-5 M
• E)4.0 × 10^-5 M

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