1. Sodium Hydroxide Experiment With Electrolysis
Mükremin Buğdacı

2. What is Brine? Brine is a concentrated solution of sodium chloride.
During electrolysis, the overall reaction is:
2NaCl(aq)+ 2H2O(l) NaOH(aq)+ Cl2(g)+H2(g)

3. The Electrolysis

4. At the Cathode Hydrogen is discharged in preference to sodium:
2H+(aq) + 2e H2(g)
As usuan at the cathode, this is reduction.

5. At the Anode Chlorine is discharged in preference to Oxygen:
2Cl- (aq) Cl2 +  2e- 
As usual at the anode, this is oxidation.

6. Sodium Hydroxide
The two gases bubble off. Na+ and OH- ions are left behind, giving a solution of sodium hydroxide. Some of the solution is evaporated to a give more concentrated solution, end some is evaporated to dryness, giving solid sodium hydroxide.

7. What the products are used for

8. Chlorine, a poisonous yellow-green gas
Used for making…
The plastic PVC
Solvents for degreasing and drycleaning
Medical drugs
Weedkillers and pesticides
Paints and dyestuffs
Bleaches
Hydrogen chloride and hydrochloric acid
It is also used as a sterilising agent, to kill bacteria in water supplies and swimming pools

9. Hydrogen, a colourless flammable gas
Used…
In making nylon
To make hydrogen peroxide
To harden vegetable oils to make margarine
As a fuel in hydrogen fuel cells

10. Sodium hydroxide solution, alkaline and corrosive
Used in making…
Soaps
Detergents
Viscose and other textiles
Paper
Ceramics
Dyes
Medical drugs

11. Sources http://aquarius.nasa.gov/pdfs/electrolysis.pdf
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