Question

Why only sulphates are commonly used in displacement reactions?

Answer 1

Displacement reactions

Displacement reactions involve a metal and a compound of a different metal. In a displacement reaction:

1)a more reactive metal will displace a less reactive metal from its compounds

Displacement reactions are easily seen when a salt of the less reactive metal is in the solution. During the reaction:

2) the more reactive metal gradually disappears as it forms a solution

3) the less reactive metal coats the surface of the more reactive metal

For example, magnesium is more reactive than copper. When a piece of magnesium is dipped into blue copper sulfate solution:

3) the blue colour fades as colourless magnesium sulfate solution forms

4) brown copper coats the surface of the magnesium

Magnesium powder is added to blue copper sulfate solution and when stirred, they change into a colourless magnesium sulfate solution and copper powder.

Here are the equations for the reaction:

magnesium + copper sulfate → magnesium sulfate + copper

Mg + CuSO4 → MgSO4 + Cu

No reaction is seen if you do things the other way round – in other words, if you put copper powder into magnesium sulfate solution. This is because copper is not reactive enough to displace magnesium from magnesium sulfate. is in the solution. During the reaction:

the more reactive metal gradually disappears as it forms a solution

the less reactive metal coats the surface of the more reactive metal

For example, magnesium is more reactive than copper. When a piece of magnesium is dipped into blue copper sulfate solution:

the blue colour fades as colourless magnesium sulfate solution forms

brown copper coats the surface of the magnesium

Magnesium powder is added to blue copper sulfate solution and when stirred, they change into

Answer 2

Explanation:

A displacement reaction take place when iron sulphate reacts with copper