What Is the Hydroxide-Ion Concentration in a 0

question 95

Multiple Choice

What is the hydroxide-ion concentration in a 0.16 M solution of Na₂CO₃? For carbonic acid,Ka₁ = 4.2 × 10^-7 and Ka₂ = 4.8 × 10^-11.(K_w = 1.0 × 10^-14)

• A)5.8 × 10^-3 M
• B)2.0 × 10^-4 M
• C)6.2 × 10^-5 M
• D)4.5 × 10^-9 M
• E)2.8 × 10^-6 M

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