Types Of Ions “Refresh”

Question 1

Why is naming Ionic compounds tricky?

Answer 1

Ionic compounds deals with multi valent ions (eg, Fe2+, Fe3+) and polyatomic ions (eg, PO4 3-, CO3 2-).

Question 2

What are Multivalent Ions?

Answer 2

They use Roman numerals.

Question 3

Name 2 examples of multivalent ions

Answer 3

1. Copper (l): The Cu+ ion is called the copper (I) ion because it has a charge of 1+
2. Copper (ll): The Cu2+ ion is called the copper (II) ion because it has a charge of 2+

Question 4

What are Polyatomic ions?

Answer 4

These are “package ions” where many atoms together make one ion.

Question 5

Name 2 examples of Polyatomic ions

Answer 5

1. The PO43- ion has 1 P atom, 4 O atoms and an overall charge of 3-
2. The PO33- ion has 1 P atom, 3 O atoms and an overall charge of 3-

Question 6

What are the rules for naming ionic compounds?

Answer 6

1. Determine if there’s a Multivalent ion present
   - If YES - use Roman numerals (eg, Tin (ll) chloride, lead (IV) oxide)
2. Determine if there’s a Polyatomic ion present
   - If YES - use brackets (eg, Mg(OH)2, Mg3(PO4)2

• If YES - use the correct Polyatomic (eg, Chlorate vs Chlorite)

Question 7

What is the IUPAC name for the following ions:

Au+, Mg2+, CO32-, Pb4+, Au3+, O2-, CI-, Pb2+, Al3+, CO22-

Answer 7

*Use “Table of Ions” sheet*
Au+ : Gold (I) ion
Mg2+ : Magnesium-ion
CO32- : Carbonate-ion
Pb4+ : Lead (IV) ion
Au3+ : Gold (III)
O2- : Oxide ion
CI- : Chloride ion
Pb2+ : Lead (II) ion
Al3+ : Aluminium-ion
CO22- : Carbonite