CHM 2210C Chapter 2 Sample Exam

Chapter 2: Part J: Identification of Acids and Bases 10 points

Label the acid and the base and their corresponding conjugate pairs for the following reactions:

 

 

 

(1) NH4 + + Cl 1- <=====> NH3 + HCl

 

 

 

 

(2) CH3OH + C-1- <======> HCl + CH3O1-

 

 

 

 

(3) C5H5NH+1 + H2O <=======> C5H5N + H3O+1

 

 

 

 

 

(4) HSeO4 1- + NH3 <=======> NH4 1+ + SeO4 2-

 

 

 

 

 

(5) HCO3 1- + OH 1- <==========> CO3 2- + H2O

 

 

 

 

 

 

 


 

CHEM 1212 M-11 Sample Exam

Part B: Equilibrium Constant Expressions of Acids and Bases 5 points

Write the appropriate equilibrium constant expressions for the following reactions they represent:

 

a. C5H5NH+1 + H2O C5H5N + H3O+1

 

 

 

Ka =

 

 

b. NH3 + H2O NH4 1+ + OH 1-

 

 

 

Kb =

 

 

c.                   H2CO3 + H2O = HCO3 1- + H3O+1

 

 

 

Ka =

 

 

 

d. HCO3 1- + H2O == CO3 2- + H3O+1

 

 

 

Ka2 =

 

 

 

 

 

e. C5H5N + H2O ==== + OH 1- + C5H5N+1

 

 

Kb =

 

 

 

f. H2O + H2O == H3O 1+ + OH 1-

 

Kw =