Oxidation And Reduction

Question 1

When will displacement reactions only happen?

Answer 1

If metal involved at the start= m⬆️ reactive

Question 2

What does a more reactive metal displace?

Answer 2

➖ reactive metal from metal salt

Question 3

What does a metal atoms lose when oxidised?

Answer 3

Electron= oxidised

Question 4

Copper sulphate + iron?

Answer 4

Iron sulphate+ copper

Question 5

What happens when a metal ion gains an electron?

Answer 5

Been Reduced

Question 6

What happens in a displacement reaction?

Answer 6

1 metal is oxidised, the other= reduced

Question 7

What is group 7 in Ptable?

Answer 7

The halogens

Question 8

What are some examples of halogens?

Answer 8

F, Cl, Br, I

Question 9

What can a more reactive halogen displace?

Answer 9

Displaces ➖ reactive halogen from halide salt
Cl+ 2Na Br-> 2NaCl + Br2

Question 10

What is the experiment for Oxidation and reduction?

Answer 10

Put iron nail in copper sulphate solution, after while-> nail=orange, liquid=brown

Question 11

What’s the equation of the iron nail and copper sulphate?

Answer 11

Fe+ Cuso4 -> Cu+ FeSO4

Question 12

Why do we write half equation?

Answer 12

Shows what happens to dif metals

Question 13

What’s the half equation for copper sulphate and iron in copper?

Answer 13

Cu^2+ (aq) + 2e^- -> Cu (s)
Copper ions=reduced

Question 14

What’s the half equation for iron in copper sulphate+iron?

Answer 14

Fe (s) + 2e^- -> Fe^2+ (aq)

Question 15

What’s an example that a m⬆️ reactive halogen displaces - reactive halogen from halide salt?

Answer 15

Aqueous solutions of halogens-> added to potassium halide solutions

Question 16

What’s a redox reaction?

Answer 16

1 metal= oxidised, other=reduced