Could you help me with this electrolysis equation?

  • #1
37
0

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?
 

Answers and Replies

  • #2
Borek
Mentor
28,777
3,248
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.
 
  • #3
37
0
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?
 
  • #4
Borek
Mentor
28,777
3,248
You can't, there is not enough information.
 

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