Use of chlorine and chlorate (1) Flashcards
1
Q
How does chlorine and water react?
A
Cl2(aq) +H2O= HCl (aq) +HClO (aq)
2
Q
What kind of reaction is it?
A
Reversible and disproportionate.
3
Q
What is HClO?
A
An oxidising agent hence toxic
4
Q
If HClO is toxic why is it used?
A
At low concentrations is it harmless to humans and kills bacteria.
5
Q
Downsides to chlorination?
A
Toxic at high concentration
6
Q
In bright sun light how does chlorine react with water?
A
2Cl2(aq) + 2H2O—> 4Cl(aq)+O2(aq)
7
Q
Why does chlorine need frequent topping up?
A
As HClO are not produced
8
Q
How does chlorine react with cold dilute NaOH?
A
Cl2 (aq) + 2NaOH(aq) —> NaClO (aq) + NaCl (aq) +H2O(aq)
9
Q
What is NaClO
A
An oxidising agent
10
Q
What is NaClO used for?
A
Used as bleach
