Pour about two inches of vinegar into
the test tube, clear plastic cup
or clear glass (be extra careful if
using a glass container).
2.) If you
are using a test tube, position it
in the test tube rack once you have
poured in the vinegar.
3.) Take the
nail and sand down the tip end of
the nail with the sandpaper (make
sure that you have a long nail to
stand in the vinegar).
the nail to rest in the vinegar.
Watch and in a few minutes you should
see bubbles appear in the test tube
around the iron nail.
bubbles are hydrogen bubbles.