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Molecules, Compounds and Formulas
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Molecules, Compounds and Formulas— Laboratory Kits, continued
Finding the Empirical Formula of an Unknown Compound— Student Laboratory Kit
By: The Flinn Staff
Have fun exploring the concept of empirical formulas! With this engag- ing activity, percent composition and the Law of Conservation of Mass is studied. Each group is given its own unknown compound to analyze and determine the formula. Students then decompose the sample by heating it in a crucible. Students gain valuable hands-on experience using an analytical balance and a crucible. This easy to set up and fun activity will engage your students the entire lab period!
Complete for 28 students working in pairs.
Ionic Formula Writing—Super Value Kit
By: The Flinn Staff
Chemical formulas such as (NH4)2SO4, with all of
those seemingly random numbers, letters and parentheses, can seem intimidating to a student who is first learning to write formulas. This kit will familiarize students with ions and allow them to actively practice combining ions in the proper ratio to determine and write correct chemi- cal formulas. Students cut out the cation and anion cards provided, match them up to make chemical formulas, write the formula on the provided data sheet, and name the compound formed. Includes repro- ducible student handouts, background information, procedure, data tables, questions, Instructor’s Notes with helpful teaching tips and an answer key, and 15 masters of cations, anions, and an ion formula chart.
Super Value Kit is complete for 15 student groups. All materials are reusable—one kit can be used over and over!
Determination of the Empirical Formula of Silver Oxide—Classic General Chemistry Experiment See page 25.
The Chemistry of Complex Ions—
Student Laboratory Kit
By: The Flinn Staff
Complex ions, coordination compounds and transition metals display some of the most brilliant and beautiful colored solutions. In this two-part experiment, students investigate the properties of complex ions. In Part 1, students form four complexes of the copper(II) ion and the cobalt(II) ion. First, they must identify the chemical formula of each complex ion. They then use the color of the solution to determine the wavelength of light absorbed by each complex ion. Part 2 has students forming solutions of five different complexes of the copper(II) ion. A series of combina- tions of these solutions are made, and the students determine the relative stabilities of the five complexes based on the precipitates or complex ions formed by the reactions. Includes reproducible student handouts, detailed background information, Instructor’s Notes with sample data and answers to questions and all necessary chemicals and consumable supplies.
Complete for 30 students working in pairs.
Finding the Empirical Formula of an Unknown Compound— Student Laboratory Kit AP8489
Catalog No.
Description
Price/Each
AP8489
Finding the Empirical Formula of an Unknown Compound—Student Laboratory Kit
$22.10
Catalog No.
Description
Price/Each
AP4570
Ionic Formula Writing—Super Value Kit
$20.60
Ionic Formula Writing—Super Value Kit AP4570
The Chemistry of Complex Ions—Student Laboratory Kit AP1758
Catalog No.
Description
Price/Each
AP1758
The Chemistry of Complex Ions— Student Laboratory Kit
$53.20