Sodium Chloride Flashcards
1
Q
If ions are dissolved in water, we have to take into account…
A
the water also.
2
Q
Hydrogen gas is produced at negative electrode if…
A
the metal is more reactive than hydrogen(reduction)
3
Q
Metal is produced at negative electrode if…
A
the metal is less reactive than hydrogen (copper, silver…)
4
Q
At positive electrode…
A
chlorine gas is produced(oxidation)
5
Q
What is left after electrolysis of sodium chloride
A
Sodium hydroxide solution.
6
Q
Half equation for H
A
2H+ + 2e– → H2 (reduction)
7
Q
Half equation for Cl
A
2Cl– – 2e– → Cl2 (oxidation)
8
Q
Brine
A
A concentrated sodium chloride solution.
9
Q
Uses of chlorine
A
- Can be reacted with the sodium hydroxide to make a bleach, which is good at killing bacteria.
- to make plastics
10
Q
Uses of hydrogen
A
-very pure and used in food industry to make margarine
11
Q
Uses of sodium hydroxide solution
A
- important alkali in industry
- to make soap and paper as well as bleach
