Model the salt toxicity of three different salts using radish seeds and process of determining the LD50 for three different salts: NaCl, MgCl2, and CaCl2. This kit contains enough materials for 8 groups of students and comes with a Teacher's manual and student study guide copymaster. The activity covers AP Environmental Science primary learning objectives STB-3.B, EIN-3.A, and EIN-3.B.* Kit Includes: Sodium Chloride Quicksolution, Makes 500 mL of 3% Solution Magnesium Chloride Quicksolution, Makes 500 mL of 3% Solution Calcium Chloride Quicksolution, Makes 500 mL of 3% Solution Radish Seeds, 20 g 48 Germination Trays with Lids 48 Pipettes 48 Cups, 5 oz. 32 Stir Sticks Toothpicks DOT Info: Non-regulated. AP® and the Advanced Placement Program are registered trademarks of the College Entrance Examination Board. The activities and materials in these kits were developed and prepared by Aldon, which bears sole responsibility for their contents.