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

1. Intro to General Chemistry

Classification of Matter

General Chemistry

1. Intro to General Chemistry

Classification of Matter

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Multiple Choice

Which of the following best describes salad dressing in terms of the classification of matter?

Homogeneous mixture (solution)

Heterogeneous mixture (suspension)

Pure substance

Colloid

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Verified step by step guidance

Step 1: Understand the classification of matter into pure substances and mixtures. Pure substances have a uniform and definite composition, while mixtures contain two or more substances physically combined.

Step 2: Recognize that mixtures can be further classified as homogeneous or heterogeneous. Homogeneous mixtures (solutions) have a uniform composition throughout, while heterogeneous mixtures have visibly different parts or phases.

Step 3: Identify the types of heterogeneous mixtures: suspensions and colloids. Suspensions have larger particles that can settle out over time, while colloids have smaller particles that remain dispersed and do not settle.

Step 4: Consider the nature of salad dressing. Many salad dressings contain oil and vinegar, which do not mix uniformly and form separate layers or droplets, indicating visible differences in composition.

Step 5: Conclude that because salad dressing shows distinct phases and particles that can separate, it is best classified as a heterogeneous mixture, specifically a suspension.