About This Chapter
ILTS Biology: Solutions - Chapter Summary
Use this chapter's lessons to renew your knowledge of the properties of solutions and calculations involving them as you study for the ILTS Biology exam. Our videos will prepare you to answer questions on topics including:
- The rate of dissolution
- Solutions, electrolytes and nonelectrolytes
- Solubility and solubility curves
- Molarity and molality concentration
- Calculations involving dilution of solutions
- Colligative properties, Raoult's law and determining molar mass
- Solubility of gases
These lessons are brief, averaging about five minutes each, and are taught by experts who understand what you should know in preparation for the exam. A clickable timeline lets you quickly locate key points in the video you wish to review.
ILTS Biology: Solutions Chapter Objectives
Illinois requires passing the ILTS Biology exam as one of the licensing requirement to teach math in a public school. The exam's 125 multiple-choice questions are divided into six subareas, including Science and Technology, Physical Science, and Organismal Biology and Ecology.
Because they also consist of multiple-choice questions, the quizzes that follow our video lessons offer practice in answering questions in a format like you'll encounter on the exam. The quizzes also let you evaluate your learning and see where extra study may be needed.
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.
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.
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.
4. Calculating Molarity and Molality Concentration
Learn the abbreviations and meaning of molarity and molality and go over some sample calculations with given concentrations.
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.
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.
7. The Solubility of Gases in a Liquid
In this video lesson, you will learn what solubility is and the factors that affect gas solubility. We will use real-life examples to illustrate the importance of understanding solubility. A quick quiz will then test our new knowledge.
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