To prove that hydrochloric acid reacts with zinc to produce hydrogen gas.
To prove that hydrogen gas is explosive.
3 inch piece of glass tubing
(2) one-hole stoppers
Balloon (one balloon per time that you wish to do the experiment!)
String (one string per balloon!)
6M hydrochloric acid
Place a one-hole stopper on each side of the glass tubing.
Fit a balloon over one of the stoppers.
Place some zinc in the bottom of the Erlenmeyer flask.
Pour the 6M hydrochloric acid into the flask until the zinc is covered with the acid and
quickly put the other stopper on the flask so it is tight and the balloon can fill with
the gas that is being generated.
When the balloon is filled, take it off the stopper and tie it with the string so none
of the gas will escape.
Let the balloon float and light a match at the end of a yard stick and bring the lighted
match to the balloon until it explodes.