Calcium project – Chalk and lemon juice – Chemistry

By |2019-02-26T05:52:48-07:00June 1st, 2017|Chemistry|

Need chalk? Buy chalk Chalk has calcium in it Take a piece of regular white chalk, like for writing on a blackboard. Make sure the chalk is calcium carbonate like the kind in the picture. Some kinds of chalk are made of plaster of paris. You don't want those. What is calcium? More [...]