Year 6 get separating

Year 6 were given the challenge of obtaining a sample of pure salt from rock salt today. 

First grind your rock salt

Ground solute dissolves quickly

Then mix with warm water so the salt dissolves. 

Then the mixture was filtered

The rocky bit ends up as the residue in the filter paper

And then the filtrate was heated to evaporate the solvent, water. 

Keep heating until nearly all the water has boiled off. 

You then get pure salt

Simple

IRP