Separating Solutions

As part of their work about dissolving Yr.6 worked to separate solutions. They found that water evaporates very slowly in normal classroom conditions. Therefore to speed the process up they heated their solutions over a candle flame. This caused the water to evaporate leaving the salt crystals behind in the tray. If they held a cold surface above their apparatus they saw the formation of condensation as the water vapour cooled and turned back into a liquid.

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