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Sodium Hydroxide Experiment With Electrolysis

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.

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Sodium Hydroxide Experiment With Electrolysis

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  1. Sodium Hydroxide ExperimentWithElectrolysis MükreminBuğdacı

  2. What is Brine? • Brine is a concentratedsolution of sodiumchloride. • Duringelectrolysis, theoverallreaction is: 2NaCl(aq)+ 2H2O(l) 2NaOH(aq)+ Cl2(g)+H2(g)

  3. TheElectrolysis

  4. At theCathode • Hydrogen is discharged in preferencetosodium: 2H+(aq) + 2e- H2(g) • As usuan at thecathode, this is reduction.

  5. At theAnode • Chlorine is discharged in preferencetoOxygen: 2Cl- (aq) Cl2 +  2e- • As usual at theanode, this is oxidation.

  6. SodiumHydroxide • 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. Whattheproductsareusedfor

  8. Chlorine, a poisonousyellow-greengas Usedformaking… • Theplastic PVC • Solventsfordegreasinganddrycleaning • Medicaldrugs • Weedkillersandpesticides • Paintsanddyestuffs • Bleaches • Hydrogenchlorideandhydrochloricacid It is alsoused as a sterilisingagent, tokillbacteria in watersuppliesandswimmingpools

  9. Hydrogen, a colourlessflammablegas Used… • Inmakingnylon • Tomakehydrogenperoxide • Tohardenvegetableoilstomake margarine • As a fuel in hydrogenfuelcells

  10. Sodiumhydroxidesolution, alkaline andcorrosive Used in making… • Soaps • Detergents • Viscoseandothertextiles • Paper • Ceramics • Dyes • Medicaldrugs

  11. Sources • http://aquarius.nasa.gov/pdfs/electrolysis.pdf • http://www.gcsescience.com/ex4.htm • http://www.science.uwaterloo.ca/~cchieh/cact/c123/eltlysis.html • http://answers.yahoo.com/question/index?qid=20070813195931AAttlJU • http://www.elkadot.com/en/chemistry/Electrolysis%20of%20Molten%20Sodium%20Chloride.htm

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