Principle of hydrogen production by electrolysis of water: 2H2O= (charged) 2H2+O2 (both gases should be marked with gas symbols), and the role of sodium hydroxide in it is to enhance the conductivity, because pure water is a weak electrolyte and the conductivity is not good, while sodium hydroxide is a strong electrolyte, which increases the conductivity.
Extended data:
Electrolytic cell, frame (including auxiliary equipment); Control box; Rectifier cabinet; The whole transformer; Supply pump; Raw material water tank; Alkaline liquor box; Analytical instruments. Hydrogen production by water electrolysis is a simple method. Direct current is introduced into the electrolytic cell filled with potassium hydroxide or sodium hydroxide, and water molecules undergo electrochemical reaction on the electrode and decompose into hydrogen and oxygen.
The chemical reaction formula is as follows: cathode: 2H2O+2eH2↑+2OH anode: 2oh-2eh2o+ 1/2o2 ↑ Total reaction formula: 2H2O2H2↑+O2↑ According to Faraday's electrolysis law, the gas output is directly proportional to the current and has nothing to do with other factors.
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