This item can only be shipped to schools, museums and science centers
What exactly are the film-like deposits left on glassware in your laboratory and pots and pans at home? Those whitish deposits are actually residues of calcium and magnesium salts found in water. As these compounds become more numerous, the “hardness” of your water becomes higher. In this kit, the level of hardness in your local water supply will be tested and measured. Kit includes reproducible student handouts, a detailed background section, complete teacher notes, tips, sample data, answers to questions, and all of the chemicals needed to perform the lab.Complete for 30 students working in pairs.