I performed an experiment where I did this:
Add one spatula of malachite to a test tube, add dilute hydrochloric acid to the malachite until the test tube is one third full. Note observations and identify gas produced.
The green solid turned to a blue solution and there was an effervescence of hydrogen. However, I now realise that copper doesn't react with acid and malachite is a copper carbonate hydroxide mineral... I researched online and found that
It dissolves in sulfuric acid to give Copper sulfate, Carbon dioxide and Water. http://wiki.answers.com/Q/What_happens_when_malachite_is_dissolved_in_sulphuric_acid?classic=true
So how did I get that malachite reacted with acid and did produce hydrogen with a squeaky pop test?
Thanks in advance