We can make the kettle airtight using cooking paper, as it can withstand a lot of heat and will not allow the steam to escape. Increasing the amount of ice will make the water condense well. The purity of water can be tested by evaporating it or by measuring its boiling point.
The purer the water, the less solid residue will be left. Pure water will leave no residue.
Pure substances have precise melting and boiling points. Pure water will boil at 100°C. If impurities are present, the boiling point will go up.
3) 2 bowls
4) Muddy water
5) Retort stand
7) Bunsen burner
8) 5 big bags of ice
9) Cooking paper
1) Collect dirty water in a bowl and pour it into the kettle
2) Put cooking paper over the top of the kettle, then put the lid on
3) Put your kettle on top of the tripod
4) Place the bunsen burner under the tripod
5) Attach the hose to the mouth of the kettle
6) Use the retort stand to support the hose
7) Place the bags of ice on top of the hose
8) Place a bowl under the other opening of the hose
9) Turn on the bunsen burner
10) Once the pure water comes out check if the water is pure, by evaporating it or checking it's boiling point with a thermometer