Ionic equations

What is a spectator ion?

• An ion that we can see change colour

• An ion that doesn't change charge during the reaction

• An ion that changes charge

What has been oxidised?

4 Na + O₂ --> 2 Na₂O

• Na

• O

• Na₂O

What are 2 meanings of oxidation?

• Adding oxygen

  or

  Adding electrons

• Removing oxygen

  or

  Removing electrons

• Adding oxygen

  or

  Removing electrons

What are 2 meanings of reduction?

• Adding oxygen

  or

  Adding electrons

• Removing oxygen

  or

  Adding electrons

• Adding oxygen

  or

  Removing electrons

What has been oxidised?

2Na + Cl₂ --> 2NaCl

• Na

• Cl

• NaCl

What has been reduced?

2Na + Cl₂ --> 2NaCl

• Na

• Cl

• NaCl

What has been reduced?

MgO + 2Na --> Na₂O + Mg

• Mg

• Na

• Na₂O

What has been oxidised?

MgO + 2Na --> Na₂O + Mg

• Mg

• Na

• Na₂O

What is the spectator ion?

MgO + 2Na --> Na₂O + Mg

• Mg²⁺

• Na⁺

• O^2-

What has been oxidised?

FeCl₃ + Al --> AlCl₃ + Fe

• Fe

• Al

• FeCl₃