Chlorine Flashcards
1
Q
How is chlorine water made?
A
when the green gas chlorine dissolves in water to make an equilibrium solution
2
Q
What is the equation for chlorine water?
A
Cl2(aq) + H20(l) ⇌ HCl(aq) + HOCl(aq)
3
Q
What happens to the Cl2?
A
been both oxidised and reduced
4
Q
What is it called when something is both oxidised and reduced?
A
disproportionation
5
Q
How can you test for chlorine water?
A
-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
6
Q
How do you make bleach?
A
add cold dilute sodium hydroxide solution to pale green chlorine water
7
Q
What is the equation for making bleach?
A
Cl2(aq) H2O(l) + 2NaOH(aq) ⇌ NaCl(aq) + NaOCl(aq) + 2H2O
