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Guided-Inquiry Experiments for General Chemistry
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Guided-Inquiry Experiments for General Chemistry, continued
Properties of Buffer Solutions—Laboratory Kit
By: The Flinn Staff
The purpose of this guided-inquiry lab kit is to design a buffer solution that will be effective in a specific pH range and to verify its buffer capacity. Students begin the investigation with an introductory activity to explore the composition and pH of ideal buffers and compare their pH changes when a strong acid and base are added. Understanding the properties of buffers prepares students for the guided-inquiry chal- lenge—to design a buffer that will provide effective protection at a specific pH and that will have the capacity to maintain the pH within
a narrow range when prescribed amounts of acid and base are added. This lab provides a culminating activity that ties together essential learning objectives relating to strong and weak acids, conjugate acid- base pairs, equilibrium constants and Ka values for acid-base reactions,
and mole ratio and stoichiometry calculations.
Complete for 24 students working in pairs.
Qualitative Analysis and Chemical Bonding— Laboratory Kit
By: The Flinn Staff
Looking for patterns in the properties of solids can help us understand how and why atoms join together to form compounds. What kinds of forces hold atoms together? How do these forces influence the properties of materials?
The purpose of this guided-inquiry lab is to design a procedure to identify twelve unknown solids based on systematic testing of their physical and chemical properties. The lab begins with an introductory activity to select measurable properties that will help identify the type of bonding in a solid. Given four solids representing the four types of chemical bonds—ionic, polar covalent, nonpolar covalent, and metal- lic—students review the properties of each solid with a minimum of four tests. The results provide a basis for a guided-inquiry design of a flow chart procedure that uses physical and chemical property tests to separate and identify twelve unknown solids.
Complete for 24 students working in pairs.
Rate of Decomposition of Calcium Carbonate— Laboratory Kit
By: The Flinn Staff
In this guided-inquiry lab, students learn how reaction rates are measured and how concentration affects the rate of a reaction as they design kinetics experiments for the heterogeneous reaction of calcium carbonate with hydrochloric acid.
The investigation begins with an introductory activity in which students observe and measure the gradual evolution of carbon dioxide gas from the decomposition of calcium carbonate with acid. Special equipment is provided for this purpose. The procedure provides a model for guided-inquiry design of kinetics experiments to determine the rate of reaction with different concentrations of acid. Students compare data obtained from measurements of both mass loss and volume of gas generation versus time. Students also employ graphical analysis to determine initial reaction rates. Other factors, such as the effect of particle size in a heterogeneous reaction, provide opportunities for further inquiry.
Complete for 24 students working in pairs.
Properties of Buffer Solutions—Laboratory Kit AP7977
Catalog No.
Description
Price/Each
AP7977
Properties of Buffer Solutions—Laboratory Kit
$51.85
GUIDED-INQUIRY EXPERIMENTS FOR GENERAL CHEMISTRY continued on next page.
Qualitative Analysis and Chemical Bonding—Laboratory Kit AP7987
Catalog No.
Description
Price/Each
AP7987
Qualitative Analysis and Chemical Bonding—Laboratory Kitt
$85.85
Catalog No.
Description
Price/Each
AP7979
Rate of Decomposition of Calcium Carbonate—Laboratory Kit
$113.30
Rate of Decomposition of Calcium Carbonate—Laboratory Kit AP7979