# Could you help me with this electrolysis equation?

## 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
Mentor
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.

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
Mentor
You can't, there is not enough information.