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Electrolysis Of Aqueous Sodium Chloride

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Uploaded by on Mar 17, 2006

doing electrolysis on the mains electricity after passing it through a transformer, i used pencil 'lead' for the carbon (graphite) electrodes instead of the copper wires so the electrodes themselves wun react. the electrolyte is aqueous sodium chloride (table salt dissolved in water). thanks for the comments, my conclusion: chlorine gas evolved in the test tube... but its yellowish green is light, almost unnoticeable... firstly hydrogen gas will form at the cathode as sodium is too reactive to be extracted there. its electrolysis of aqueous sodium chloride not molten one anyway... chlorine gas will be formed at the anode as i put in plenty of salt in the water

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Uploader Comments (bck1990)

  • that is not sodium chloride... but a solution of water and salt...

    for an electrolysis of sodum chloride >800 degrees calcius are needed

    @baytekkDesigns:

    using mercury is much too dangerous... mercury is a toxic heavy metal...

    it's much more easier to build a so called downs cell, melt the salt in it and using the electrolysis method to separate the Na and the Cl2...

  • it is aqueous sodium chloride, not molten sodium chloride...

  • Hmm, very interesting video! Would try it, but I wonder what you do with all that chlorine afterward? I guess you'd want to be pretty careful with it.

  • well i switch on my fan to the maximum to remove all the gases, and i pour away the solution and clean up the basin. lol

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  • what would happen if you dropped butter into the solution midway through experimentation? =D

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  • @Kaugummimann its aqeous sodium chloride. molten sodium chloride, which you are thinking of, needs high temperatures and yeilds different products.

  • @henrythecat11111

    lol, there is not enough H2 gas for any explosive force to be strong enough to break that glass. H2 is weak and can burn you, but the, 5 mL's he's collecting is harmless. LMAO, university? my 8th graders can perform this reaction. No need to get our panties in a bunch.

    lol, glass in your face?

  • This was really cool, thanks for the video!

    I know, not really productive comment, but it is really hard to find any intelligent videos sometimes.

  • @atourdeforce well at least theres one person who knows that they're talking about watching these videos

  • This means even though OH- are bleow cl-  in the reactivit series , cl- will be released in this case as the concentration is greater.I think it is this way!

  • It all boils down to the selective discharge of ions. Though hydroxide ions are much preferred over chloride ions, however, due to high concentration of the NaCl solution, chloride ions would still be discharged at the anode to produce chlorine gas.

  • you dont need to go to school for common sense..

    if that is salt water, it is Cl and H2, the O2 is a redox reaction with the sodium. if there were to be any exploding there would have to be much higher volts and about 1 liter of H2 gas. ( in order to get a face full of glass.)

  • Also, if your hypothesis was assumed to be correct, you would be extracting sodium and chlorine... In water.

    Your face would STILL be full of glass.

  • That test tube is filled with H2 and O2. Were you to accidentally touch those wires together you'd have your face full of glass shrapnel.

    Please do not practice chemistry until you have taken it either FULLY through highschool, or at least freshman university.

  • of coarse not, the oil would firstly react, an inhert gas is non reactive, its only used to keep off reactive air stopping other compounds forming, secondly it would also burn at that heat, so no it wouldnt work under any circumstances, good try tho i see why you might of thought so.

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