2006-11-11 22:53:19 · 5 answers · asked by crazi_gal 1 in Science & Mathematics ➔ Chemistry
You must be talking about Potassium Chloride solution and not Potassium Chloride in molten form. So it would contain K+, Cl-, H+, OH- ions, and once electricity is passed through, K+ and H+ migrate to the cathode. Hydrogen being lower in the electrochemical series get discharged first as Hydrogen gas, (2H+ + 2e- ----> H2) and both Cl- and OH- ions migrate to anode but because of concentration effect, Cl- loses electrons and get discharged as Cl2 gas. (2Cl- - 2e- ---> Cl2) Thus K+ and OH- ions are left behind. These form Potassium Hydroxide and all group I hydroxides are alkali hence the resulting solution is alkaline.
2006-11-11 23:24:43 · answer #1 · answered by HsNWarsi 2 · 0⤊ 0⤋
Potassium ion will not be discharged at the negative electrode, so it stays in solution. Hydrogen is discharged instead.
At the positive electrode, chlorine can be discharged.
When completely hydrolyzed, the formula might look
like the following:
2KCl + 2H(OH)>*> H2 + 2K(OH) + Cl2
Hydroxyl ion is a strong base, and when the strong acid (the hydrogen or hydronium ion) is removed by electrolysis, the solution is no longer neutral. It exhibits an alkaline or basic pH.
2006-11-12 07:24:59 · answer #2 · answered by hls 6 · 0⤊ 0⤋
actually , there is no alkalinity in this solution
KCl -> [K+] + [Cl-]
the two ions come from a strong alkali and an strong acid
so they will be completely electrolyzed. This is the reason why this solution has no alkalinity
2006-11-12 08:15:26 · answer #3 · answered by James Chan 4 · 0⤊ 0⤋
on electrolysis KCL gives HCL salt and K(OH)2...
potassiumhydroxide is a base abd thus it is alkaline in nature.
2006-11-12 07:04:27 · answer #4 · answered by rajesh1040 2 · 0⤊ 0⤋
presence of hydroxyl ions
2006-11-12 08:17:52 · answer #5 · answered by gerald n 1 · 0⤊ 0⤋