How do you test for H2S?

Answer 1

The Squeaky Pop Test

Mg and HCl are in a test tube reacting, immediately after placing the Mg inside the test tube, place a second test tube upside down on top of the the first tube

When they have finished reacting, place you thumb over the top of the second tube (the one containing the H2 gas). flip it, and light a match (a splint works the same) quickly remove your thumb and place the match/splint over the tube. It should produce a pop (may be a squeek, depending on how well you do it)

Copper and hydochloric acid

2 HCl + 2 Cu --> 2 CuCl + H2 (for Cu 1+)

2 HCl + Cu --> CuCl2 + H2 (for Cu 2+)

so yes, hydrogen gas is produced for both copper I and copper II

Answer 2

One common way to test for hydrogen sulfide (H2S) is by using lead acetate test strips, which change color in the presence of H2S gas. Another method is performing an oxidation-reduction reaction with lead acetate and an acid solution, which produces a black lead sulfide precipitate in the presence of H2S. Additionally, portable gas detectors can also be used to measure H2S levels in the air.

Answer 3

Introduce lead acetate soaked filter paper.It will turn into black.