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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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