What Is the Correct Equation for the Electrolysis of NaOH and Water?

[prishila]

Homework Statement

Write the water electrolise of NaOH.

Homework Equations

NaOH+H2O->H2+O2+NaOH

The Attempt at a Solution

2NaOH+2H2o->2H2+O2+2NaOH
I thought to write 2H2O->2H2+O2
If I am given the mass of NaOH (which in one problem I am), then how am I supposed to find the mas of H2O for example?
Is it right to write this way
2NaOH+2H2o->2H2+O2+2NaOH
or
NaOH+2H2o->2H2+O2+NaOH?

 

[Borek]

NaOH is just a spectator, it doesn't react. What it does it increases the solution conductivity.

Amount of gases produced doesn't depend on the amount of NaOH (at least not stoichiometrically), instead it is given by Faraday's law.

 

[prishila]

NaOH is just a spectator, it doesn't react. What it does it increases the solution conductivity.

Amount of gases produced doesn't depend on the amount of NaOH (at least not stoichiometrically), instead it is given by Faraday's law.

I am given the mass of NaOH 40g. I have to find the mass of substances added in cathode and anode. How can I find it?

 

[Borek]

You can't, there is not enough information.