What did Alchemists do?

They tried to turn lead into metal

and make potions for ever lasting life(live forever)

They also tried converting cheap metal to gold. With this contribution, it really helped a lot in barter. And also, the alchemists believed that with some magic, you can be immortal. It is said that they discovered philosopher's stone. Once you have that stone, you'll be immortal.

With the help of the Alchemists, they made Chemistry part of science.

Follow me on twitter @osomlystoopid