Section 8.3
Names and Formulas for Ionic Compounds
Practice Test
1.
How many ions are produced when one unit of sodium phosphate (Na
3
PO
4
) dissolves in water?
a.
2
b.
3
c.
4
d.
8
Hint
2.
What is the name given to the simplest ratio of ions in an ionic compound?
a.
empirical formula
b.
formula unit
c.
mole
d.
monatomic ion
Hint
3.
What kind of ion is iodide (I
-
)?
a.
monatomic anion
b.
polyatomic anion
c.
monatomic cation
d.
polyatomic cation
Hint
4.
What is the charge on a monatomic ion?
a.
reduction number
b.
oxidation number
c.
mass number
d.
Avogadro’s number
Hint
5.
Sulfate (SO
4
2-
) is a ____________.
a.
monatomic anion
b.
polyatomic anion
c.
monatomic cation
d.
polyatomic cation
Hint
6.
What is the correct name of Fe
2
O
3
?
a.
iron oxide
b.
iron(I) oxide
c.
iron(II) oxide
d.
iron(III) oxide
Hint
7.
What is the formula for ammonium bromide?
a.
NH
4
Br
b.
NH
3
Br
c.
(NH
4
)
2
Br
d.
NH
4
Br
2
Hint
8.
Name the pair that contains an incorrect formula.
a.
aluminum phosphate AlPO
4
b.
iron(II) sulfite FeSO
3
c.
silver carbonate AgCO
3
d.
magnesium hydroxide Mg(OH)
2
Hint
9.
Which one of the following classifications of ions in the table contains an error?
Hydroxide
OH
-
monatomic
anion
carbonate
CO
3
2-
polyatomic
anion
ammonium
NH
4+
polyatomic
cation
magnesium
Mg
2+
monatomic
cation
a.
hydroxide
b.
carbonate
c.
ammonium
d.
magnesium
Hint
