Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

1. Matter and Measurements

Classification of Matter

GOB Chemistry

1. Matter and Measurements

Classification of Matter

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0:45 minutes

Problem 73c

Textbook Question

Classify each of the following mixtures as homogeneous or heterogeneous:
c. vegetable oil

Verified step by step guidance

Step 1: Understand the definitions of homogeneous and heterogeneous mixtures. A homogeneous mixture has a uniform composition throughout, meaning its components are evenly distributed and not visibly distinguishable. A heterogeneous mixture has a non-uniform composition, where the components are visibly distinct or unevenly distributed.

Step 2: Consider the physical properties of vegetable oil. Vegetable oil is a liquid that appears uniform in composition and does not separate into different phases under normal conditions.

Step 3: Determine if vegetable oil has any visible or distinguishable components. Since vegetable oil does not show visible separation or distinct parts, it is consistent throughout.

Step 4: Based on the observations, classify vegetable oil as either homogeneous or heterogeneous. Since it has a uniform appearance and composition, it is classified as a homogeneous mixture.

Step 5: Conclude that vegetable oil is a homogeneous mixture because it meets the criteria of having a uniform composition without visible separation of components.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Homogeneous Mixtures

Homogeneous mixtures are uniform in composition and appearance, meaning that the individual components are not distinguishable. An example is saltwater, where the salt is completely dissolved, creating a consistent solution. In these mixtures, any sample taken will have the same composition as any other sample.

Heterogeneous Mixtures

Heterogeneous mixtures consist of visibly different substances or phases. The components can often be separated by physical means, and their proportions can vary throughout the mixture. An example is a salad, where you can see and identify the individual ingredients, making it clear that the mixture is not uniform.

Properties of Vegetable Oil

Vegetable oil is typically considered a homogeneous mixture when it is pure, as it appears uniform and consistent throughout. However, if mixed with other substances (like water), it can form a heterogeneous mixture due to the separation of oil and water phases. Understanding the context of the mixture is crucial for proper classification.

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Related Practice

Textbook Question

A dietitian includes one of the following mixtures in the lunch menu. Classify each as homogeneous or heterogeneous.

b. tea

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Textbook Question

Which of these terms, (i) mixture, (ii) solid, (iii) liquid, (iv) gas, (v) chemical element, (vi) chemical compound, applies to the following substances at room temperature?

a. Gasoline

b. Iodine

c. Water

d. Air

e. Blood

f. Sodium bicarbonate

g. Gaseous ammonia

h. Silicon

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Textbook Question

Hydrogen peroxide, often used in solutions to cleanse cuts and scrapes, breaks down to yield water and oxygen: Hydrogen peroxide, H₂O₂(aq) → Hydrogen, H₂(g) + Oxygen, O₂(g)

b. Which of the substances are chemical compounds, and which are elements?

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Textbook Question

Classify each of the following as an element, a compound, or a mixture:

b. a salad dressing of oil and vinegar

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Textbook Question

Classify each of the following mixtures as homogeneous or heterogeneous:

b. herbal tea

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Textbook Question

A white solid with a melting point of 730 °C is melted. When electricity is passed through the resultant liquid, a brown gas and a molten metal are produced. Neither the metal nor the gas can be broken down into anything simpler by chemical means. Classify each—the white solid, the molten metal, and the brown gas—as a mixture, a compound, or an element.

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Textbook Question

Daniel suggests that Charle include one of the following mixtures in his diet. Classify each of the following as homogeneous or heterogeneous: b. tea

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Multiple Choice

Which of the following statements is true?