The Chlor-Alkali Industry Flashcards
1
Q
What is brine?
A
A concentrated solution of sodium chloride (NaCl) in water
2
Q
Why is electrolysis of brine important?
A
Converts a cheap raw material (common salt) into three important chemicals: •Chlorine • Hydrogen •Sodium hydroxide - No waste products
3
Q
Source of sodium chloride:
A
Sea water
4
Q
Uses of rock salt:
A
Help to defrost roads
5
Q
________ forms at the negative electrode.
A
Hydrogen gas
6
Q
________ forms at the positive electrode
A
Chlorine gas
7
Q
In the electrolysis of dilute sodium chloride, __________ is left behind, dissolved in the electrolyte.
A
Sodium hydroxide
8
Q
Uses of hydrogen:
A
- Fuel
- Margarine
- Nylon
9
Q
Half equation at the anode (positive electrode) during electrolysis of brine:
A
2Cl⁻ → Cl₂ + 2e⁻
10
Q
Half equation at the cathode (negative electrode) during electrolysis of brine:
A
2H⁺ + 2e⁻ → H₂
11
Q
The electrolyte is ____.
A
Brine
