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Electrolysis of S alt S olution. na-_sue2010. Aim. Complete an electrical circuit, do experiment electrolysis of salt solution using carbon electrode with natural indicator and see change the color . . APPRATUS /CHEMICALS. Result. Experiment using the U tube.

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Presentation Transcript
slide2
Aim
  • Complete an electrical circuit, do experiment electrolysis of salt solution using carbon electrode with natural indicator and see change the color.
result
Result

Experiment using the U tube

analysis data
Analysis data
  • From the experiment Electrolysis of salt solution, we can see the change of color at the katode and anode.there is caused by the reaction that it happen at each electrode.
  • The ionic reaction from the solution :

NaCl(aq)→ Na+ + Cl-

Na2SO4(aq)→ 2Na+ + SO42-

KI (aq)→ K+ + I-

  • At the katode, there is have a reduction and at the anode is oxidation. The experiment use sodium and potassium that can’t be reducted.
slide8

Experiment that use blue litmus, sodium chloride solution after electrolysis at the part of catode there is no change of color (still blue),and at anode the color change be red and the end is white.

  • Which is due at the anode,which is oxidized Cl be Cl2 which is strong oxidant that can obscure the color
  • Padapercobaanmenggunakankertaslakmusbiru, larutanNaClsetelahdielektrolisispadabagiankatodatidakmengalamiperubahanwarna (tetapbiru), sedangkanpadaanodaberubahmenjadimerahdanpadaakhirnyaputih.
  • Hal inidisebabkanpadabagiananoda, yang dioksidasiadalahCl- menjadi Cl2 yang merupakanoksidatorkuatsehinggadapatmengaburkanwarna.
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