Chemical Filtration

We look at how chemical filtration can be used to remove contaminants from water. Potassium permanganate is used as the contaminant. First, we try to remove it using physical filtration, with filter paper and a funnel. This does not work. We then add activated charcoal, which the potassium permanganate bonds with. When the contaminated water is filtered again only the water passes through, so the contaminant has been removed by chemical filtration. Chemistry - Atoms And Bonding - Learning Points. Activated charcoal can be used to remove certain chemical contaminants from water. The filtrate is a solution that passes through filter paper in a filter funnel. Physical filtration cannot remove soluble contaminants. A Twig Experiment Film. Let students experience real experiments in lab conditions anywhere, from setup, method all the way through to analysis and real-world application.