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Consider the Reaction
CO32-(aq)+ H2O(l) HCO3-(aq)+ OH-(aq) ×\times 10-4 at 25°C

Question 26

Multiple Choice

Consider the reaction
CO32-(aq) + H2O(l)  Consider the reaction  CO<sub>3</sub><sup>2-</sup>(aq) + H<sub>2</sub>O(l)    HCO<sub>3</sub><sup>-</sup>(aq) + OH<sup>-</sup>(aq) .K<sub>b</sub> for CO<sub>3</sub><sup>2-</sup> is 2.1  \times  10<sup>-4</sup> at 25°C. What is K<sub>a</sub> for the HCO<sub>3</sub><sup>-</sup> ion at 25°C? A)  4.8  \times  10<sup>3</sup> B)  4.8  \times  10<sup>-11</sup> C)  2.1  \times  10<sup>-4</sup> D)  7.2  \times  10<sup>-12</sup> E)  9.2  \times  10<sup>-8</sup> HCO3-(aq) + OH-(aq) .Kb for CO32- is 2.1 ×\times 10-4 at 25°C.
What is Ka for the HCO3- ion at 25°C?


A) 4.8 ×\times 103
B) 4.8 ×\times 10-11
C) 2.1 ×\times 10-4
D) 7.2 ×\times 10-12
E) 9.2 ×\times 10-8

Correct Answer:

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