The membrane keeps the chlorine gas away from the sodium hydroxide solution.
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Transcript of The membrane keeps the chlorine gas away from the sodium hydroxide solution.
The membrane keeps the chlorine gas awayfrom the sodium hydroxide solution.
It allows ions through but not molecules
During electrolysis;
i) at the positive terminal: Oxidation is electron loss
2Cl- - 2e- Cl2 Chloride ions form Chlorine molecules by depositing electrons at the positive anode
ii) at the negative terminal: Reduction is electron gain
2H+ + 2e- H2
hydrogen ions form hydrogen molecules by receiving electrons from the negative cathode
A reaction where both reduction and oxidation occurs is called a ‘Redox’ reaction. ( OIL RIG ! )
CO2 + C CO
During electrolysis;
i) at the positive terminal: Oxidation is electron loss
2Cl- - 2e- Cl2 Chloride ions form Chlorine molecules by depositing electrons at the positive anode
ii) at the negative terminal: Reduction is electron gain
2H+ + 2e- H2
hydrogen ions form hydrogen molecules by receiving electrons from the negative cathode
A reaction where both reduction and oxidation occurs is called a ‘Redox’ reaction. ( OIL RIG ! )
CO2 + C CO
During electrolysis;
i) at the positive terminal: Oxidation is electron loss
2Cl- - 2e- Cl2 Chloride ions form Chlorine molecules by depositing electrons at the positive anode
ii) at the negative terminal: Reduction is electron gain
2H+ + 2e- H2
hydrogen ions form hydrogen molecules by receiving electrons from the negative cathode
A reaction where both reduction and oxidation occurs is called a ‘Redox’ reaction. ( OIL RIG ! )
CO2 + C CO
Ions present: Na+, Cl- from sodium chloride H+ , OH- from water
Ions remaining: Na+ (aq) OH- (aq)
Ions present: Na+, Cl- from sodium chloride H+ , OH- from water
Ions remaining: Na+ (aq) OH- (aq)
c hs h s
c h
NaOH + H2 + Cl222 2
Sodium metal at cathode
Chlorine gas at anode