1. The problem statement, all variables and given/known data Write the water electrolise of NaOH. 2. Relevant equations NaOH+H2O->H2+O2+NaOH 3. 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?