Analytical Gravimetric Determination of a Carbonate AP Chemistry Kit

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Meets AP® Chemistry experiment 16. Using stoichiometry and their gravimetric data, students identify the Group I metal in an unknown carbonate. The carbonate is dissolved in water, precipitated with excess calcium ions, and filtered, dried, and weighed. Students use the mass of calcium carbonate recovered and the reaction's stoichiometry to identify the metal ion. The activity offers practice balancing chemical equations and using stoichiometric relationships to calculate formula weights and atomic masses.

Materials are sufficient for 30 students working in pairs.
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