Group 1 and 7

Question 1

what is the balanced symbol equation for the reaction that takes place between chlorine and potassium iodide

Answer 1

Cl (small 2) + 2KI —> 2KCl + I (small 2)

Question 2

Name the order of the reactivity of the halogens

Answer 2

Chlorine - most
Bromine
Iodine - least
Chlorine is the most because it has the most overall reaction and iodine is the least because it has the least overall reactions

Question 3

Explain the chemical reactivity in group 7

Answer 3

As you go down the group the reactions become slower and less vigourous. This means the reactivity of group 7 elements decrease as you go down the group

Question 4

In a silver nitrate test what colour is chloride bromide and iodide

Answer 4

Chloride - White
Bromide - Cream
Iodide - Yellow