PreparED Study Materials

CHEM 123: Foundations of CHEM II Lecture

School: Old Dominion University

Number of Notes and Study Guides Available: 2

Notes

Videos

Ethylene Glycol & Freezing Point in Antifreeze
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We explore the impact of increasing the concentration of ethylene glycol in an antifreeze mixture, explaining the resulting effect on the freezing point of the solution by examining its interaction with water molecules.

What is a propeller twist?
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Unravel the concept of propeller twist and its role in aviation and marine propulsion. We'll delve into the science and engineering behind this intriguing phenomenon, shedding light on its applications and significance.

Calculating the Mass of a Sucrose Crystal: A Chemistry Insight
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Explore the fascinating world of chemistry as we calculate the mass of a sugar crystal with 1.8 x 10¹? molecules of sucrose. Using the concept of a mole and Avogadro's number, discover how to convert molecular numbers to milligrams. Grasp foundational principles in a clear, engaging format.

Finding NaOH Molarity: Titration of 0.200L SO?-Derived H?SO? Solution
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Determine the molarity of a NaOH solution through titration with sulfurous acid. Starting with the ideal gas equation we derive the concentration of a 0.200L SO?-derived H?SO? solution. Concluding with a molarity of 1.64 M for NaOH using calculated values.

Element Classification: Rep, Trans, Inner-Trans, Noble Gases
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We categorize elements into representative, transition, inner-transition, and noble gases based on their positions in the periodic table and general characteristics, without revealing specific element classifications.

Physical vs Chemical Changes: Understanding Reactions & Transformation
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Discover the differences between physical and chemical changes using common examples. Understand how sugar reacts in various scenarios, and how metals undergo changes, either maintaining their substance or forming new compounds.

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