Control of gas flow in high school chemistry experiment

When the gas velocity is fast, the bubble generation rate is fast; When the gas flow rate is slow, the bubble generation rate is also slow.

By observing the bubble velocity, we can know the approximate velocity of gas velocity. Too fast will slow down the ventilation speed, too slow will speed up the ventilation speed.

In addition, hydrogen and nitrogen should be introduced into a container filled with concentrated sulfuric acid to produce NH3 from H2 and N2.