What Is the Hydroxide-Ion Concentration in a 0

question 93

Multiple Choice

What is the hydroxide-ion concentration in a 0.10 M solution of Na₂CO₃? For carbonic acid,K_a1 = 4.2 × 10^-7 and K_a2 = 4.8 × 10^-11.(K_w = 1.0 × 10^-14)

• A) 4.6 × 10^-3 M
• B) 2.0 × 10^-4 M
• C) 4.9 × 10^-5 M
• D) 4.2 × 10^-9 M
• E) 2.2 × 10^-6 M

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