The perfect lab activity for students to learn about solubility, solubility curves, saturated solutions, and saturation temperature. The solubility of compounds in water can vary widely with temperature. In many cases, “rules” do not apply to solubility patterns, so the solubility of a chemical can only be determined through experimentation and construction of a solubility curve. In this lab activity, students will create the solubility curve for potassium nitrate—a compound whose solubility in water increases 1700% from 0 to 100 ºC! Students will measure saturation temperatures for six different concentrations of potassium nitrate, and then make a solubility curve from the data. Graphical analysis of the data allows students to determine at a glance whether a solution is unsaturated, saturated, or supersaturated.
Includes reproducible student handouts, detailed background information, Teacher Notes with sample data and answers to questions, and all necessary chemicals and consumable supplies.
Complete for 30 students working in pairs.
Additional ResourcesNo Additional Resources at the time.
Flinn Catalog/Reference Manual Page 496
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