Last week, Y5 explored which solvents (substances) would create a solution when added to a solvent (water).
If you can’t see any of the particles from the solvent (salt, sugar, rice, sultanas etc…), it has created a solution. If the particles of the solvent sink to the bottom, this is called a residue and a solution has not been created.
Can you get the solvent back once it has been mixed into the solute (water), even if it made a solution?
We sieved and filtered our variables to find out whether we got any back.
The rice and sultanas could be separated from the water and some things were trapped by the filter but lots of our tests still haven’t separated. We’re now leaving them to evaporate to see if anything is left in the cup once the water has all gone.