The method of detecting hydrogen sulfide by lead acetate
The main method for testing hydrogen sulfide is often lead acetate. Cover the gas of hydrogen sulfide and encounter lead acetate, that is, a biochemical reaction.

Take the solution of lead acetate and place it in an open container. If hydrogen sulfide gas diffuses and the two touch, the solution will gradually change. Its color turns darker, or it is brown-black. This is because hydrogen sulfide and lead acetate combine to produce lead sulfide. Lead sulfide is black in color, so the color of the solution changes.

When performing this test, pay attention to the surrounding environment. Do not let other things disturb it, and the container should be clean, and the solution must be pure. In this way, the test result is true. It is convenient and clear to test hydrogen sulfide with lead acetate, which is beneficial for recognizing the nature of gas and identifying the quality of matter.