How to make "Hokaron"

Success example

3 ml of salt solutions (5%) are put into what mixed the activated carbon 2g with the iron powder 20g.
temperaturas before experiment	temperatura after experiment

Failure example

3 ml of water is put into the iron powder 20g.		3 ml of salt solutions (5%) are put into the iron powder 20g.
temperaturas before experiment	temperatura after experiment	temperaturas before experiment	temperatura after experiment
２２．６℃	２２．６℃	２２．６℃	２２．６℃