Remembering the Polyatomic ions

Match the following ions to their mnemonics.

• sulfate

• NO

• carbonate

• SO

• ammonium

• NeH

• hydroxide

• OH

• nitrate

• COld

Match the following ions to their mnemonics.

• NeH

• nitrate

• NO

• ammonium

• OH

• sulfate

• CO

• hydroxide

• SO

• carbonate

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

4

3

2-

-

1

Label the ion correctly.

a

b

c

nitrate

-

2-

carbonate

sulfate

+

nitrogen

3

hydroxide

nitride

Label the ion correctly.

a

b

c

4

-

nitrate

hydroxide

1

ammonium

hydrogen

sulfate

2-

3

Label the ion correctly.

a

b

c

4

-

+

ammonium

nitrate

2-

1

ammonia

sulfate

3