[HD] Electrolysis of concentrated sodium chloride solution & detailed explanation

Electrolysis of concentrated sodium chloride solution & detailed explanation
I am going to do an experiment about electrolysis as my weekend project. I have used concentrated sodium chloride solution and pencil as electrode as pencil is made up of graphite which can conduct electricity.
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[wb5rue]

It DOES make sodium but it immediatly reacts with the water to produce NaOH. If you test the solution for pH you would find that it is strongly alkyline

[honnam]

@wb5rue

you mean sodium metal? It does not exist!!!!!! It can only appear as sodium ion which reacts with OH- ions to form sodium hydroxide.

[2t22tornadosiren]

Why doesn't it make sodium? Would it make sodium if it was done with salt in oil?

[honnam]

The reason why in this experiment cannot make sodium is that sodium is a strong reducing agent, that means sodium is very reactive and it is in a high position in the electrochemical series. It is very difficult for sodium ion to be discharged. Therefore H+ ion will be discharged in this case instead of sodium ion.

[Sherwah1]

The formula for sodium chloride is NaCl, then why the moles of chlorine atoms are formed at anode. Shouldnt it be "cl- = cl - + e-".I dont get why Cl 2 is formed. whear as in formula it is NaCl and not NaCl 2

[honnam]

As Cl- ion is attracted by the positive electrode, it carries out oxidation. Cl- has a higher concentration so it changes to Cl2.

your equation is absolutely WRONG!!!!!! you don't know how to balance the charge of the equation

[12414666]

@honnam Um dumbass look up sodium metal on youtube it does exsist

[wb5rue]

@honnam It does not produce Sodium ions. It produces Sodium which immediatly reacts with the water to produce NaOH. NaCl produces Sodium ions and Chlorine ions in a solution but when you introduce the electric charge/current the Sodium goes to the negative electrode and the Chlorine goes to the positive electrode where it outgasses. This leaves the excess Sodium to react with the water. TECHNICALLY the Sodium is not an ion at that point.

[YakstarProductions]

10,000 viewssssss

[Ali548]

Why does it get green colour?

[MTVrocker]

It depends on the solution as well. If NaCl aq is used, the H2 will come from the water ( 2H20 + 2e -> h2 + 2OH- ) which occurs at the cathode. Na + e -> Na(s) of course occurs as well but it has a Ered value of -2.71 which means hydrogen gas will be evolved instead of Na(s).

[acmfraser]

@2t22tornadosiren its the water that produses the hydrogen so dont think so

[lockheed22]

@honnam But the NaOH can be extracted through crystallization.

[starshock01]

@2t22tornadosiren it cant create something thats already there, the sodium just changes to a hydroxide(a strong base)

[starshock01]

@honnam sodium metal does exist, just the chlorine ion turns to chlorine and the h20 donates the hydroxide ion, forming h2 gas and cl2 gas

[xxDarkGregxx]

I'm so confused. I thought the electrolysis of NaCl formed Sodium Chlorate? -.-*