Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

6. Chemical Quantities & Aqueous Reactions

Solubility Rules

General Chemistry

6. Chemical Quantities & Aqueous Reactions

Solubility Rules

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Multiple Choice

Which property is the basis of the purification technique recrystallization?

The difference in density between the compound and impurities

The ability of a compound to sublime at room temperature

The difference in solubility of a compound in hot and cold solvents

The difference in boiling points between the compound and impurities

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Verified step by step guidance

Understand that recrystallization is a purification technique used to separate a desired solid compound from impurities based on their solubility differences.

Recognize that the key principle behind recrystallization is that the compound and impurities have different solubilities in a particular solvent at different temperatures.

At high temperature, the compound is more soluble in the solvent, allowing it to dissolve, while impurities may remain dissolved or not dissolve well depending on their nature.

Upon cooling the solution, the solubility of the compound decreases significantly, causing it to crystallize out of the solution, while impurities remain dissolved due to their different solubility behavior.

Therefore, the basis of recrystallization is the difference in solubility of the compound in hot and cold solvents, which allows selective crystallization and purification.