Wiki Page, CHEM 109 General Chemistry I 41650: Lecture 12 Materials (9/21/20)

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2020-09-18T11:57:13-07:00

Lecture 12- Solutions and Dilutions

To make a solution, we dissolve a solute in a solvent. As chemists, we use specific units to quantify the concentrations of these solutions. We will be calculating concentrations in moles per liter, or molarity in this lecture. It's also very common to make a concentrated, or stock, solution to store in labs for later use since concentrated solutions take up less space than diluted ones. Think about all of the concentrated juice in the freezer section at the supermarket- it's much more space efficient for the store to sell concentrated juice and have you add the water at home. When you add water to the concentrated juice, you are performing what chemists call a dilution. In this lecture we will learn how to calculate the new concentration of a solution that is made when a dilution is performed.

Lecture Materials:

Chem 109 Chapter 4 Lecture Slides (slides 1-12)

Lecture Practice Problems

The recording of this synchronous lecture will be posted after the lecture. To attend lecture use the following Zoom link: