1 - use a conical flask containing water sample , which is on a tripod and gauze. the top of the conical flask has a delivery tube and is pointed into a test tube . the test tube is sat in a beaker containing water and ice
2 - gently heat the water using a bunsen burner until the water boils gently . the water will evaporate and form water vapour
3 - the water vapour travels along the collecting tube. when the water vapour hits the cold test tube, it condenses back into a liquid water. this is distilled water.
4 - distilled water contains no dissolved solids and has a pH of 7, which is pure