Acid and Base Worksheet



Acid and Base Worksheet – Answers

1) Write equations for the following acid-base reactions and indicate each conjugate acid-base pair:

a) HNO3 + OH- ( H2O + NO3-

A B CA CB

conjugate acid-base pairs:

HNO3 and NO3-

OH- and H2O

b) OH- + HPO4-2 ( H2O + PO43-

B A CA CB

conjugate acid-base pairs:

HPO42- and PO43-

OH- and H2O

c) HSO3- + HF ( H2SO3 + F-

B A CA CB

conjugate acid-base pairs:

HSO3- and H2SO3

HF and F-

2) Write the names for the following acids and bases:

a) KOH potassium hydroxide

b) H2Se hydroselenic acid

c) C2H3O2H acetic acid

3) Write the formulas for the following chemical compounds

a) ammonium sulfate (NH4)2SO4

b) cobalt (III) nitride CoN

c) carbon disulfide CS2

4) anion: HCO3-

HCO3- + H+ ( H2CO3 (acting as a base)

HCO3- ( H+ + CO32- (acting as an acid)

or

HCO3- + H2O ( H2CO3 + OH- (acting as a base)

HCO3- + H2O ( H3O+ + CO32- (acting as an acid)

4) What are the pH and pOH for pure water?

pH and pOH = 7

(Since [H+] and [OH-] = 1.0 x10-7 M)

In the following questions data is given to help calculate the four values of pH, pOH, [H+] and [OH-]. Calculate all values not given.

5) The pH of a solution of hydrochloric acid is 1.53

pOH = 12.47

[H+] = 0.0295 M

[OH-] = 3.39 x 10-13 M

6) The [OH-] concentration is 0.00100 mol/L

pH = 11.0

pOH = 3.0

[H+] = 1.0 x 10-11 M

8) The pOH of a solution of perchloric acid (HClO4) is 13.910

pH = 0.0900

[H+] = 0.813 M

[OH-] = 1.23 x10-14 M

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