Precautions for water electrolysis

1. The voltage used in electrolyzing water and the concentration of the acid solution are closely related to the rate of gas release. When using a voltage of 18 to 24 volts and a sulfuric acid concentration of 1:6 to 1:8, gas is generated at the two poles at a faster rate and the bubbles are larger. It only takes 4 to 5 minutes to accumulate a certain amount of gas, and an obvious volume can be seen. Compare.
2. The main reason why the oxygen volume obtained by electrolyzing water is low is due to side reactions:
Cathode: 2H2SO4=2H++2HSO4-
Anode: 2H++2e-=H2; H2S2O8++H2O=H2SO4+H2SO5; H2SO5+H2O=H2SO4+H2O2
The hydrogen peroxide generated at the anode is relatively stable in the acidic solution and is not easy to decompose into oxygen, so the volume of oxygen is low. The difference in solubility of oxygen and hydrogen in water is minor.
3. The gas pipe when synthesizing water must be tightly fixed on the iron stand. It is best to put a layer of plastic sheet on the bottom of the glass sink.
4. When synthesizing water, do not use a volume ratio of hydrogen and oxygen of 2:1, because the explosive power is strongest at this time. In order to prevent the glass tube from bursting, you can use nylon yarn or plastic paper to make a protective sleeve over the upper part of the glass tube.