Ch 15: Praxis General Science: Solutions & Solubility

About This Chapter

This chapter will help you prepare for portions of the Praxis General Science exam that deal with solutions and solubility. Lessons on properties, calculations, and principles of solutions will help you feel ready to answer related questions in the exam.

Praxis General Science: Solutions & Solubility - Chapter Summary

The video lessons within this chapter will walk you through the chemistry behind scientific solutions, illustrating the principles involved with them and the calculations that go into their creation. Once you're finished with this chapter, you'll have reviewed the following:

  • The rate of dissolution
  • Electrolyte and non-electrolyte solutions
  • Solubility and solubility curves
  • Calculating molarity, molarity concentration, and the dilution of solutions
  • Determining molar mass
  • Colligative properties and Raoult's law

With the step-by-step approach of these video lessons, you can study for the exam at your own pace and ensure you're comfortable with each concept discussed before tackling another. Preparing for the exam in this way will help you go into the test fresh, with strengthened comprehension of the questions awaiting you.

Praxis General Science: Solutions & Solubility Chapter Objectives

The Praxis General Science test is a computer-based exam aimed towards measuring your scientific edification and teaching skills. The test is comprised of 135 multiple-choice questions that you'll have up to 2.5 hours to answer. This chapter of the study guide covers subjects that will make up part of the physical science section of the exam, which includes 51 questions in total and will make up 38% of your final exam score.

7 Lessons in Chapter 15: Praxis General Science: Solutions & Solubility
Test your knowledge with a 30-question chapter practice test
The Rate of Dissolution: Factors and Definition

1. The Rate of Dissolution: Factors and Definition

Learn what dissolution is and the factors that affect the rate of dissolution, such as temperature, surface area, polarity and pressure. Learn what miscible and immiscible mean in regards to liquids.

Solutions, Electrolytes and Nonelectrolytes

2. Solutions, Electrolytes and Nonelectrolytes

Learn what a solution is and how it is formed. Learn how to express the concentration of a solution in terms of molarity, molality and mass percent. Discover the differences between an electrolyte and a nonelectrolyte.

Solubility and Solubility Curves

3. Solubility and Solubility Curves

Learn what solubility is as well as the definitions of 'saturated,' 'unsaturated' and 'supersaturated.' Learn how to determine the solubility of a substance in water by using a solubility curve. Discover the effects of pressure and temperature on the solubility of liquids, solids and gases.

Calculating Molarity and Molality Concentration

4. Calculating Molarity and Molality Concentration

Learn the abbreviations and meaning of molarity and molality. Then apply what you have learned by going over some sample calculations with given concentrations.

Calculating Dilution of Solutions

5. Calculating Dilution of Solutions

Learn what a solution is and how to properly dilute a new solution from a stock solution. Learn the dilution equation that combines molarity, the volume of stock solution and desired solution to determine how much stock solution is needed for the new solution.

Colligative Properties and Raoult's Law

6. Colligative Properties and Raoult's Law

Learn how vapor pressure and osmotic pressure are colligative properties. Learn Raoult's Law and how to use it to determine the vapor pressure of a solution. Learn the equation for determining osmotic pressure and how to use it to determine the molar mass of a substance.

Using Colligative Properties to Determine Molar Mass

7. Using Colligative Properties to Determine Molar Mass

In this lesson, we will explore the effect of colligative properties on a solution. We will learn how to calculate freezing point depression and see how it can be used to calculate the molar mass of an unknown substance.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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