Procedure for the experiment.
1. crush 1 stick of classroom chalk (a mixture of limestone and...
Procedure for the experiment.
1. crush 1 stick of classroom chalk (a mixture of limestone and gypsum) finely.
2. mix chalk into 50 ml of water in a beaker.
3. pour the mixture through filter paper into another beaker. the water appears to be "pure."
4. boil the water or let it evaporate away.
what is left?
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