A real-world application for a fundamental concept—percent composition! Calcium magnesium acetate (CMA) is sold commercially as a “green” chemical deicer. It is less corrosive than salt for melting ice and protects delicate pet paws. Determine the percent composition of calcium versus magnesium acetate in CMA using a simple three-step process. Titrate with EDTA to determine total calcium and magnesium content, precipitate calcium ions with ammonium oxalate, and then carry out a second EDTA titration on the filtrate to measure the amount of magnesium. Quantitative lab helps develop good lab skills and provides relevant experience for calculating number of moles, molar mass, and percent composition.
Includes reproducible student handouts, detailed background information, complete Teacher Notes with sample data and answers to all questions, and all chemicals and consumable supplies needed to perform the lab.
Complete for 30 students working in pairs. Burets are required and available separately.
Additional ResourcesNo Additional Resources at the time.
Flinn Catalog/Reference Manual Page 503
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