Chlorine

Question 1

How is chlorine water made?

Answer 1

when the green gas chlorine dissolves in water to make an equilibrium solution

Question 2

What is the equation for chlorine water?

Answer 2

Cl2(aq) + H20(l) ⇌ HCl(aq) + HOCl(aq)

Question 3

What happens to the Cl2?

Answer 3

been both oxidised and reduced

Question 4

What is it called when something is both oxidised and reduced?

Answer 4

disproportionation

Question 5

How can you test for chlorine water?

Answer 5

-add universal indicator paper to chlorine water, turns red due to acidic HCl/HOCl, then is bleached white
-in solution- goes red then bleached colourless as HOCl is a bleach

Question 6

How do you make bleach?

Answer 6

add cold dilute sodium hydroxide solution to pale green chlorine water

Question 7

What is the equation for making bleach?

Answer 7

Cl2(aq) H2O(l) + 2NaOH(aq) ⇌ NaCl(aq) + NaOCl(aq) + 2H2O