Review_of_Basic_Concepts

# Review_of_Basic_Concepts - Review of Basic Concepts I have...

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Review of Basic Concepts I have compiled the following problems to help serve as a review of some basic mathematical and chemical concepts. The problems contained herein are representative of those fundamental concepts that you should already know and have retained from previous classes. Although there are many qualitative aspects to the material presented in Chemistry 41, this course is primarily a quantitative course which will focus heavily on problem solving. As you work through the exercises below, you should go back and review those concepts that you do not remember, or that you struggled with. Your General Chemistry text is an excellent resource to go back and review all of these fundamental concepts. If you no longer have your General Chemistry textbook, your Analytical Methods textbook (Harris, Quantitative Chemical Analysis) has a number of early chapters that you can go through to review these concepts as well (see course syllabus). Finally, you may come to see me if you are unsure how to work any of the below problems. Basic Math: 1. Consider the following expression: 1 . 8 x 1 0 = ( x ) ( x ) ( 0 . 5 0 - x ) - 5 a. Rearrange the above expression so that it is a quadratic expression in X. b. Use the quadratic equation to solve for X . Show your setup and work for this problem. Ans: X = 3.0 x 10 -3 2. Consider the following calibration plot: Calibration Plot Absorbance vs. Fe(II) Concentration y = 0.0395x - 0.001 0.000 0.200 0.400 0.600 0.800 1.000 1.200 1.400 1.600 1.800 0.00 10.00 20.00 30.00 40.00 50.00 [Fe(II)] (ppm) Absorbance 1

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a. From the above calibration plot, what is the slope? b.
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## This note was uploaded on 11/03/2009 for the course CHEM 241 taught by Professor Tiani during the Spring '08 term at UNC.

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Review_of_Basic_Concepts - Review of Basic Concepts I have...

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