C5.2 Displacement Reactions

Question 1

What happens in displacement reactions

Answer 1

A more reactive metal will displace a less reactive metal from an aqueous solution of one of its slats

Question 2

Example of magnesium and copper sulfate reaction

Answer 2

In this magnesium is more reactive than copper. Therefore thr copper ioms will be displaced from sultion to form copper metal and the magnesium metal forms aqueous magnesium ions and dissolves in solution.

Magnesium+copper sukfate—-> magnesium sulfate + copper

Question 3

Oxidation and reduction

Answer 3

Involves transfer of electrins rwther than oxygen atoms so oxidation is the loss of electrons and reduction is the gain of electrons

Question 4

What si redox reactiom

Answer 4

In which both oxidation and recutiom takes place

Question 5

What is a half equation

Answer 5

A half equation is an equation that shows the gain or loss of electrons of a single element in a reaction.

As an example, the half equation for the reduction of oxygen is:
O2 + 4e- ➔ 2O2-

Question 6

What is half equation for the oxidation of magnesium

Answer 6

Mg ➔ Mg2+ + 2e-

Question 7

In displacement reactions are metals ions reduced or oxidised

Answer 7

The metal ions are reduced so they gain electrons

Question 8

In displacement reactions are the metal atoms reduced or oxidised

Answer 8

In displacement reactions, the metal atoms are oxidised (they lose electrons).