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Lesson 1: Introduction to Solutions |
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Assignments & Research |
Knowing the terminology of science is central to its understanding. The unit begins by having students define key terms used in association with solution chemistry. This is followed by an explanation of the common rule of thumb "Like Dissolves Like" - a brief refresher is given on intermolecular bonding and molecular polarity. The lesson ends by connecting the concept of equilibrium (Unit 3) to basic principles of solubility. |
Demonstrations may be performed to introduce the basic concepts of solutions including the effect of temperature on solubility. Suggested activities are provided in the Teacher Lab. |
Assignment 1 - Solution Vocabulary |
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Lesson 2: Measuring Solution Concentration |
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| This lesson focuses on the concepts and calculations required to measure solution concentration and the concentration of ions in solution. While molarity is stressed as the most common measure of concentration, other measures such as ppm (parts per million) are also introduced. | Students may gain practice in preparing standard solutions by making the solutions required for the Precipitation Reactions Lab. Students should be assigned the tasks of calculating the required masses of solid needed in addition to using the proper techniques to make the solutions. |
Practice 1 - Calculations Involving Solution Concentration Assignment 3 - Calculations involving Solution and Ion Concentrations |
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Lesson 3: Solubility |
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Labs |
Assignments & Research |
The concept of solubility may be explored in various ways including how it is affected by temperature (Solubility Curves). The concept of equilibrium is extended to solutions, and the equilibrium constant Keq is applied to solutions as Ksp. Solubility tables are used to provide a qualtitative assessment of solubility and are also used to predict precipitation reactions. |
Solubility of a Salt - students collect data and prepare their own solubility curve. Precipitation Reactions - students predict and then test for precipitation reactions when a variety of solutions of ionic compounds are combined. |
Practice 4 - Solubility Curves and Solubility Tables Assignment 4 - The Solubility Product Constant, Ksp |