Question

1. Write an equation for each acid or base showing its ionization in water, and write...

1. Write an equation for each acid or base showing its ionization in water, and write the equilibrium constant expression for the weak acid or base.

Nitrous Acid, HNO2

Ka = 4.0 x 10-4

Acetic Acid, HC2H3O2

Ka = 1.8 x 10-5

Hypochlorous Acid, HOCl

Ka = 3.5 x10-8

Pyridine, C5H5N

Kb = 1.7 x 10-9

Diethylamine, (C2H5)2NH

Kb =4.38 x 10-4

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Homework Answers

Answer #1

1) Nitrous Acid, HNO2

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

Ka = [NO2-] [H3O+]/ [HNO2]

2) Acetic Acid, HC2H3O2

HC2H3O2 + H2O <------------> C2H3O2- + H3O+

Ka = [ C2H3O2-] [H3O+]/ [ HC2H3O2]

3) Hypochlorous Acid, HOCl

  HOCl+ H2O <------------> OCl- + H3O+

Ka = [ OCl- ] [H3O+]/ [  HOCl]

4) Pyridine, C5H5N

C5H5N + H2O <------------> C5H5NH+ + OH-

Kb = [ C5H5NH+ ] [OH-]/ [C5H5N]

5) Diethylamine, (C2H5)2NH

(C2H5)2NH + H2O <------------> (C2H5)2NH2+ + OH-

Kb = [(C2H5)2NH2+] [OH-]/ [ (C2H5)2NH]

  

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