This is a quick and fun qualitative chemistry lab that I use to break up the tedium of writing names and formulas. It takes about 30 minutes, is exciting to students, demonstrates good chemistry techniques, etc. Students react mossy zinc with hydrochloric acid to produce hydrogen gas. After collecting a small amount, they ignite it with a lit splint. It burns with a yappy dog sort of barking sound that gets them all aglow with the joy of doing science.
You will need a small amount of mossy zinc and about 2 ML of 1.25-1.5M HCl per student group.
While it is a qualitative lab, it has good questions to drive learning as well and is appropriate as a simple chemical reaction for lower grades and as an inquiry lab for all levels of chemistry.
There is no key for the questions, but there are teacher prep instructions.