Remembering the Polyatomic ions

Match the following ions to their mnemonics.

• hydroxide

• OH

• ammonium

• SO

• carbonate

• NO

• sulfate

• NeH

• nitrate

• COld

Match the following ions to their mnemonics.

• CO

• hydroxide

• OH

• nitrate

• SO

• sulfate

• NO

• carbonate

• NeH

• ammonium

Memorising the Charge (value), we use this.

• 1 1 2 2 1

• • - - - - +

• 1 3 4 3 4

Memorising the Charge (sign), we use this.

• 1 1 2 2 1

• • - - - - +

• 1 3 4 3 4

Memorising the subscript, we use this.

• 1 1 2 2 1

• • - - - - +

• 1 3 4 3 4

Sulfate

• S^2-

• SO₄^2-

• NO₃^-

• OH^-

Complete the formula of sulfate ion.

a

b

2-

3

-

4

1

Label the ion correctly.

a

b

c

+

hydroxide

3

nitrogen

nitrate

2-

-

sulfate

nitride

carbonate

Label the ion correctly.

a

b

c

1

sulfate

ammonium

3

-

4

2-

hydroxide

hydrogen

nitrate

Label the ion correctly.

a

b

c

ammonia

-

nitrate

4

+

ammonium

3

1

2-

sulfate