This item can only be shipped to schools, museums and science centers
Ever wonder where your drinking water comes from and how it is purified? Demonstrate to your students the water purification process using this highly visible, commercially tested procedure. Dramatic demonstration shows rapid purification of water using an alum solution. When alum solution is introduced to a water sample, sand and dirt particles coagulate and fall to the bottom of the water sample. A great demonstration to introduce your water quality unit. Kit includes extensive tips and extensions, a detailed background section, and enough materials to perform the demonstration seven times.Concepts: Precipitation, water purification.Time Required: 25 minutesMaterials Provided: Alum, ammonia, sand.