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

Previous problemNext problem

0:42 minutes

Problem 5b

Textbook Question

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

Verified step by step guidance

Understand the definitions of homogeneous and heterogeneous mixtures: A homogeneous mixture has a uniform composition throughout, meaning the 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.

Consider the composition of tea: Tea is typically made by dissolving tea compounds in water, resulting in a uniform liquid where the dissolved substances are evenly distributed.

Determine if the components of tea are visibly distinguishable: In a properly prepared tea, the dissolved compounds and water form a single phase, and the components are not visibly distinct.

Classify the mixture: Since tea has a uniform composition and the components are not visibly distinguishable, it is classified as a homogeneous mixture.

Note exceptions: If the tea contains undissolved particles, such as tea leaves or other solid additives, it would then be classified as a heterogeneous mixture. However, this is not the case for a typical prepared tea.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Video duration:

42s

Play a video:

Was this helpful?

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 a solution where the solute is completely dissolved in the solvent, resulting in a consistent mixture throughout. In the context of the question, a homogeneous mixture would appear the same throughout, regardless of where you sample it.

Heterogeneous Mixtures

Heterogeneous mixtures consist of visibly different substances or phases. The components can often be separated by physical means, and their distribution is not uniform. For instance, a salad is a heterogeneous mixture because you can see and identify the individual ingredients, which do not blend into a single phase.

Classification of Mixtures

The classification of mixtures into homogeneous and heterogeneous is essential in chemistry and food science. This classification helps in understanding the properties and behaviors of different mixtures. In the case of tea, whether it is classified as homogeneous or heterogeneous depends on whether the tea leaves are present or if the mixture is fully brewed and clear.

Watch next

Master Classification of Matter with a bite sized video explanation from Jules

Start learning

Related Videos

Related Practice

Open Question

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

a) Ammonia, NH₃

b) Gold bar

c) Orange juice

d) Wine

e) Saline solution

Classify each of the following pure substances as an element or a compound:

d. rust (Fe₂O₃)

1424

views

Textbook Question

Classify each of the following pure substances as an element or a compound:

b. hydrogen peroxide (H₂O₂)

1537

views

Textbook Question

Classify each of the following as a pure substance or a mixture:

c. ice (H₂O)

1451

views

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

1388

views

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?

1569

views

Textbook Question

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

b. a salad dressing of oil and vinegar

1628

views

Textbook Question

Classify each of the following mixtures as homogeneous or heterogeneous:

c. vegetable oil

1868