What Is the Hydronium-Ion Concentration in a 0

question 138

Multiple Choice

What is the hydronium-ion concentration in a 0.018 M solution of carbonic acid,H₂CO₃? For carbonic acid,Ka₁ = 4.2 × 10^-7 and Ka₂ = 4.8 × 10^-11.

• A)1.8 × 10^-2 M
• B)4.2 × 10^-7 M
• C)4.8 × 10^-11 M
• D)8.7 × 10^-5 M
• E)4.3 × 10^-5 M

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