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 + NO3A
B
CA
CB
conjugate acid-base pairs:
HNO3 and NO3OH- and H2O
b)
OH- + HPO4-2  H2O + PO43B
A
CA
CB
conjugate acid-base pairs:
HPO42- and PO43OH- and H2O
c)
HSO3- + HF  H2SO3 + FB
A
CA
CB
conjugate acid-base pairs:
HSO3- and H2SO3
HF and F-
2)
3)
Write the names for the following acids and bases:
a)
KOH
potassium hydroxide
b)
H2Se
hydroselenic acid
c)
C2H3O2H
acetic acid
Write the formulas for the following chemical compounds
a)
ammonium sulfate
(NH4)2SO4
b)
cobalt (III) nitride
CoN
c)
carbon disulfide
CS2
4)
anion: HCO3HCO3- + 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