Lab-Aids: Modeling Stream Erosion and Deposition Expand-A-Kit

Lab-Aids: Identification of Substances Kit Specific positive and negative ions are often used to identify inorganic substances. In this kit, students are asked to identify common metallic and non-metallic ions in zinc, cadmium, antimony, barium, sulfate, sulfide, sulfite, and carbonate. Through the identification process, students learn that each substance has distinctive properties. As a closing activity, students conduct chemical tests on four unknown substances. All test results are safe, clear, colorful, and unmistakable! Since one kit provides supplies for twelve students working individually, LAB-AIDS‚® recommends ordering additional kits. The Identification of Substances Kit is an excellent complement to the Identification of Chemical Reactions Kit (LAB-84).   Scientific Concepts: A thorough introduction to acid and bases Produce hydrogen by reacting acids with metals Collect and safely test hydrogen Produce carbon dioxide by reacting carbonates with acids Collect and test carbon dioxide Observe effects of acids and bases on indicator dyes Measure concentration of acids by titration of an "unknown" Perform a neutralization experiment Content List: 1 Teacher's Guide with MSDS 50 Student Worksheets and Guides 12 Chemplates with spatulas and gas collector caps, LAB-AIDS‚® 12 Gas delivery tubes 1 Absorbent paper, Package 1 Calcium carbonate chips, Vial 1 Unknown #1, Vial 1 Unknown #2, Vial 1 Unknown #3, Vial 1 Unknown #4, Vial 1 Barium Chloride Solution, Drop control bottle 1 Antimony Chloride Solution, Drop control bottle 1 Cadmium Nitrate Solution, Drop control bottle 1 Lead Acetate Solution, Drop control bottle 1 Potassium Permanganate Solution, Drop control bottle 1 Sodium Sulfate Solution, Drop control bottle 1 Sodium Sulfite Solution, Drop control bottle 1 Zinc Nitrate Solution, Drop control bottle 3 6M Hydrochloric Acid, Drop control bottle 3 Saturated Limewater, Drop control bottle 3 Sodium sulfide Solution, Drop control bottle Classroom Planning: To complete this kit requires one ~50-minute class period. Number of students: 50 ‚