obtain the Kb value for NO2-. And the Ka value for C5H5NH+ Please explain in detail

Question

Question

obtain the Kb value for NO2-. And the Ka value for C5H5NH+

Please explain in detail

science chemistry

Answer 1

Answer #1

Ka of HNO2 = 5.6 x 10^-4

HNO2 + H2O -----------> NO2- + H3O+

Ka of HNO2 = 5.6 x 10^-4

NO2- + H2O -----------> HNO2 + OH-

Kb = [HNO2] [OH-] / [NO2-]

Ka x Kb = Kw

5.6 x 10^-4 x Kb = 1.0 x 10^-14

Kb of NO2- = 1.8 x 10^-11

2)

Kb of of C5H5N = 1.7 x 10^-9

C5H5NH+ + H2O --------------> C5H5N + H3O+

Ka = Kw / Kb

= 1.0 x 10^-14 / 1.7 x 10^-9

Ka = 5.9 x 10^-6

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Answer 2

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