pH Practice

1
pH Practice

• In the following questions data is given to help
  calculate the values of pH, pOH, H OH-.
  Calculate all values not provided.
• A 0.100 M solution of HCl.
• The pH of a solution of HCl is 1.530.
• A 0.100 M solution of NaOH.
• The pOH of a soln of HClO4 is 13.910.
• A 0.00250 M NaOH solution.
• The pH of a solution of NaOH is 13.90.
• A 0.00250 M KOH solution.
• The OH- concentration is 0.00100 M.

2
Acid-Base Practice
Identify (by formula) the conjugate bases of the
following acids
NH41
H2O
HSO4-1
HCl
HPO4-2
Identify (by formula) the conjugate acids of the
following bases
H2O
S-2
CO3-2
NO2-1
F-1
Identify the Acid, Base, Conjugate Acid, and
Conjugate Base of this reaction
HNO2 H2O ? H3O NO2-
3
Ka and Kb Calcs practice

1. Acetic acid (vinegar) is a weak acid. If the
   C2H3O2H 0.200 M and H3O 0.0019 M,
   calculate Ka for acetic acid.
2. Timethylamine is a weak base. If the initial
   concentration of trimethylamine is 0.390 M and
   the equilibrium conc of OH- is 4.4 x 10-3 M,
   calculate the Kb.
3. Chloroacetic acid, HClO2, has a Ka of 1.0 x 10-2.
   Calculate the pH of a 0.10 M solution of
   chlorous acid.

4
Hydrolysis of Salts Practice
Hydrolysis Rxn
A/B/N
PB
PA
Salt
NaC2H3O2
(NH4)2SO4
CaI2
5
Titration Practice

1. Calculate the conc of a nitric acid solution if a
   20 ml sample of the acid required an average vol
   of 55 ml of a 0.047 M solution of Ba(OH)2 to
   reach the endpoint of the titration.
2. 15 ml of 12 M Hydrochloric acid is diluted to 250
   ml. A 10.0 ml aliquot is measured and titrated
   with an unknown concentration of Potassium
   hydroxide. What is the concentration of the
   hydrochloric acid? What is the concentration of
   the Potassium hydroxide solution?