Principle

In this experiment, the
properties of graphite powder and diamond are examined and
compared.The experiments show that graphite, diamond and coal are
very different from the external impression, and are used in very
different industrial fields. In chemical reactions it is
shown, however, that they are only the different modifications of
one and the same element. Furthermore the occurrence and the
properties of the carbon oxides and the carbonic acid are presented
and the connections with the example calcium carbonate and water
hardness are explained.