sodium hydroxide experiment with electrolysis
DESCRIPTION
Sodium Hydroxide Experiment With Electrolysis. Mükremin Buğdacı. What is Brine ?. Brine is a concentrated solution of sodium chloride . During electrolysis , the overall reaction is: 2 NaCl( aq )+ 2 H2O(l) 2 NaOH( aq )+ Cl2(g)+H2(g). The Electrolysis. At the Cathode. - PowerPoint PPT PresentationTRANSCRIPT
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Mükremin Buğdacı
Sodium Hydroxide Experiment With Electrolysis
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Brine is a concentrated solution of sodium chloride.
During electrolysis, the overall reaction is:
2NaCl(aq)+ 2H2O(l) 2NaOH(aq)+ Cl2(g)+H2(g)
What is Brine?
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The Electrolysis
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Hydrogen is discharged in preference to sodium:
2H+(aq) + 2e- H2(g)
As usuan at the cathode, this is reduction.
At the Cathode
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Chlorine is discharged in preference to Oxygen:
2Cl- (aq) Cl2 + 2e-
As usual at the anode, this is oxidation.
At the Anode
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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.
Sodium Hydroxide
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What the products are used for
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Used for making…The plastic PVCSolvents for degreasing and drycleaningMedical drugsWeedkillers and pesticidesPaints and dyestuffsBleachesHydrogen chloride and hydrochloric acid
It is also used as a sterilising agent, to kill bacteria in water supplies and swimming pools
Chlorine, a poisonous yellow-green gas
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Used…In making nylon
To make hydrogen peroxide
To harden vegetable oils to make margarine
As a fuel in hydrogen fuel cells
Hydrogen, a colourless flammable gas
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Used in making…Soaps DetergentsViscose and other textilesPaperCeramicsDyesMedical drugs
Sodium hydroxide solution, alkaline and corrosive
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http://aquarius.nasa.gov/pdfs/electrolysis.pdfhttp://www.gcsescience.com/ex4.htmhttp://www.science.uwaterloo.ca/~cchieh/
cact/c123/eltlysis.htmlhttp://answers.yahoo.com/question/index?
qid=20070813195931AAttlJUhttp://www.elkadot.com/en/chemistry/
Electrolysis%20of%20Molten%20Sodium%20Chloride.htm
Sources
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