What is the chemical equation for producing hydrogen?

Chemical equation is Zn+H2SO4=ZnSO4+H2↑.

Reaction principle: Metal with stronger metal activity than hydrogen reacts with acid, and hydrogen element is replaced. note:

1, it is best not to use hydrochloric acid here, because the reaction is exothermic, and hydrochloric acid will volatilize hydrogen chloride gas, so that the prepared gas contains hydrogen chloride impurities. Zinc+hydrogen chloride = zinc chloride+H2 =.

2. When potassium, calcium, sodium and other metals react with dilute acid, hydrogen in water will be preferentially replaced to generate corresponding alkali, and the reaction is too intense.

3. The selected metal should react with acid at a moderate rate and generate uniform bubbles.

4, can't use nitric acid or concentrated sulfuric acid, because these two acids have strong oxidation, the reaction will produce NO2 or SO2.

Extended data:

Hydrogen is flammable and explosive, so pure hydrogen is very dangerous.

If there is a sharp knocking sound during combustion, it means that hydrogen is impure; It is easy to explode, so we must pay enough attention to it.

In case of hydrogen leakage, the treatment method is: quickly evacuate people in the leaked contaminated area to the windward, isolate them, and strictly restrict access. Cut off the fire. It is recommended that emergency personnel wear self-contained positive pressure breathing apparatus and fire protection clothing. Cut off the leakage source as much as possible. Reasonable ventilation and accelerated diffusion.

If possible, use an exhaust fan to send the leaked gas to an open place, or install a suitable nozzle for combustion. Leaked containers should be properly treated, repaired and inspected before use. Fire extinguishing method: cut off the gas source. If the gas source cannot be cut off immediately, it is not allowed to extinguish the burning gas. Spray water to cool the container, and if possible, move the container from the fire to an open place. Extinguishing agent: atomized water, foam, carbon dioxide and dry powder.