What Is a Homogeneous Mixture?

Carolyn LaRoche, Derrick Arrington, Christianlly Cena
  • Author
    Carolyn LaRoche

    Carolyn LaRoche has been a high school science teacher for twenty years. Her specialties include biology, chemistry, forensic science and anatomy and physiology. She also has laboratory research experience. Carolyn holds a BA in Biological Sciences/Premed and a MS in Forensic Chemistry.

  • Instructor
    Derrick Arrington

    Derrick has taught biology and chemistry at both the high school and college level. He has a master's degree in science education.

  • Expert Contributor
    Christianlly Cena

    Christianlly has taught college Physics, Natural science, Earth science, and facilitated laboratory courses. He has a master's degree in Physics and is currently pursuing his doctorate degree.

Learn and understand what a homogeneous mixture is. Study the properties of homogeneous mixtures, and see liquid, solid, and gaseous homogeneous mixture examples. Updated: 02/04/2022

What Is a Homogeneous Mixture?

A homogeneous mixture is defined as two or more substances that are evenly distributed with each other. Like when NaCl dissolves in water and the Na+ and Cl- ions and equally interspersed with the water molecules. The composition of the mixture is the same throughout, and the components can not be easily separated from each other. Homogeneous mixtures can involve substances in any state (solid, liquid and gas) and are also called solutions.


Coffee, a popular drink around the world, is a homogenous mixture. Homogeneous mixtures are also called solutions.

What is a homogeneous mixture? A cup of coffee meets the homogeneous mixture definition.


Heterogeneous vs. Homogeneous Mixtures

A pure substance is something that only contains a single type of matter, like iron or hydrogen gas. A homogeneous mixture, or solution, may appear to be a pure substance as the components are not easily distinguishable from each other. In a homogeneous mixture, however evenly distributed, at some point the components were separate and could be separated again. It may take a process such as evaporation, distillation or chromatography to separate the components, but they can still be separated.

  • In evaporation, a solid dissolved in a liquid can be separated from that liquid by adding heat to the liquid and turning it in to its vapor form, leaving the solid behind.
  • Distillation heats a mixture of liquids until each of the mixture components turns into a vapor at its specific boiling point. The vapors are then collected and allowed to condense back to liquid in separate containers, thus separating the solution.
  • There are several types of chromatography. What they all have in common is they separate the components of a homogeneous mixture in reference to their molecular mass. Heavier molecules will fall out of solution in a chromatography process much faster than a lighter weight one.

A heterogeneous mixture is a mixture in which the components can be easily identified and easily separated from each other. Unlike the homogeneous mixture, the parts of a homogeneous mixture can be physically picked apart with no need for any separation techniques like distillation, evaporation or chromatography. A great common example of a heterogeneous mixture would be a mixed salad. The lettuce, tomatoes, cucumbers and other vegetables, meats or cheeses can be tossed together but they can just easily be picked apart into separate piles. It is also impossible to say that every sample of a salad, and therefore a heterogeneous mixture, would be completely uniform and equal to every other sample as is the case in a homogeneous mixture.


Sand is a heterogeneous mixture of crushed rock, the exoskeletons of microscopic organisms and other organic matter

Sand is a heterogeneous mixture.


What Are Homogeneous Mixtures?

There are all types of mixtures, and we encounter them frequently in our daily lives. Mixtures can be found in the liquids we drink, the foods we eat, and the air we breathe.

Homogeneous mixtures have the same composition throughout, and the individual parts of the mixture are not easily identifiable. Homogeneous mixtures are also referred to as solutions. While we normally think of solutions as liquids, such as soft drinks and lemonade, they can actually be in the form of solids, liquids, and gases. Homogeneous mixtures can also be a combination of these forms, as in a liquid-gas mixture.

An error occurred trying to load this video.

Try refreshing the page, or contact customer support.

Coming up next: Hydrogen Chloride: Formula, Structure & Properties

You're on a roll. Keep up the good work!

Take Quiz Watch Next Lesson
 Replay
Your next lesson will play in 10 seconds
  • 0:05 What are Homogeneous Mixtures?
  • 0:41 Examples of…
  • 2:15 Lesson Summary
Save Save Save

Want to watch this again later?

Log in or sign up to add this lesson to a Custom Course.

Log in or Sign up

Timeline
Autoplay
Autoplay
Speed Speed

Properties of Homogeneous Mixtures

In a homogeneous mixture, all the components maintain their own chemical properties and identities. Sodium chloride dissolved in water creates salt water but the salt is still composed of the ions Na+ and Cl-, and the water is still water. No chemical process has occurred to change them into completely new things. Homogeneous mixtures can be solid, liquid or gas, but in order to be homogeneous, or form a solution, they must be of uniform state once mixed.

Homogeneous mixture can be formed in many ways. Sometimes a gas can dissolve in a liquid like in a carbonated drink where carbon dioxide is dissolved in water. Several solid metals can be melted together to make a new solid. This is called an alloy. Metal alloys are unique because the combined properties of the metals in the mixture are often more desirable than any of the single elements that are in the alloy.

Examples of Homogenous Mixtures

Homogeneous mixtures are all around us. Let's examine the different types of homogeneous mixtures we may encounter. One type of homogeneous mixture involves solid substances being combined. An example of this type of mixture is steel, which is a mixture of carbon and iron metal. These types of homogeneous mixtures involving metals are often referred to as alloys. It is important to note that no matter what size the piece of steel, you should always find the same ratio of carbon to iron in the composition, even though you cannot see the specific molecules of carbon and iron.

Gases can be combined to form homogeneous mixtures as well. The air that you are breathing right now is an example of this. It is composed of nitrogen, oxygen, carbon dioxide, and other gases combined. While we cannot pick out the individual molecules in the air around us, the composition of the air is the same whether you are in a small room or a huge stadium. This makes the air we breathe an example of a homogeneous mixture.

To unlock this lesson you must be a Study.com Member.
Create your account

Video Transcript

What Are Homogeneous Mixtures?

There are all types of mixtures, and we encounter them frequently in our daily lives. Mixtures can be found in the liquids we drink, the foods we eat, and the air we breathe.

Homogeneous mixtures have the same composition throughout, and the individual parts of the mixture are not easily identifiable. Homogeneous mixtures are also referred to as solutions. While we normally think of solutions as liquids, such as soft drinks and lemonade, they can actually be in the form of solids, liquids, and gases. Homogeneous mixtures can also be a combination of these forms, as in a liquid-gas mixture.

Examples of Homogenous Mixtures

Homogeneous mixtures are all around us. Let's examine the different types of homogeneous mixtures we may encounter. One type of homogeneous mixture involves solid substances being combined. An example of this type of mixture is steel, which is a mixture of carbon and iron metal. These types of homogeneous mixtures involving metals are often referred to as alloys. It is important to note that no matter what size the piece of steel, you should always find the same ratio of carbon to iron in the composition, even though you cannot see the specific molecules of carbon and iron.

Gases can be combined to form homogeneous mixtures as well. The air that you are breathing right now is an example of this. It is composed of nitrogen, oxygen, carbon dioxide, and other gases combined. While we cannot pick out the individual molecules in the air around us, the composition of the air is the same whether you are in a small room or a huge stadium. This makes the air we breathe an example of a homogeneous mixture.

To unlock this lesson you must be a Study.com Member.
Create your account

  • Activities
  • FAQs

Homogeneous Mixture: Identifying Error Activity

This activity will help you assess your knowledge of homogeneous mixtures.

Guidelines

For this activity, print or copy this page on a blank piece of paper. Identify the word that makes the sentence wrong and explain your answer. Neatly write the LETTER of your answer or NO ERROR on the appropriate blank space provided before the number and your EXPLANATION below the sentence.


Sentences

__________ 1.) The a.) composition of a homogeneous mixture b.) may differ and the individual parts of the mixture are c.) not easily identifiable.


__________ 2.) A a.) homogeneous mixture of b.) metals is referred to as c.) steel.


__________ 3.) Being composed of a.) nitrogen, oxygen, carbon dioxide, and other gases combined, b.) the air is a good example of a c.) homogeneous mixture.


__________ 4.) a.) Iced soda in a glass, topped with ice cream is a homogeneous mixture that b.) uniformly distributes the parts within the c.) beverage.


__________ 5.) a.) Homogeneous mixtures can contain b.) one form of matter all throughout the c.) solution.


Answer Key

1.b

A homogeneous mixture has a uniform composition all throughout.

2. c

Steel is a type of alloy which is a homogeneous mixture involving metals.

3. NO ERROR

The air's composition is always the same everywhere making it a good example of a homogeneous mixture.

4. a

This type of drink does not mix all the parts well since a topping is involved.

5. b

It can contain solid, liquid, or gas phases mixed together.

What are examples of homogeneous mixtures?

A homogenous mixture contains two or more substances that are evenly distributed with each other. The components of a mixture retain their own properties and can be solid, liquid or gas. Examples include steel, the gases in a scuba tank and carbonated soda.

What are homogeneous mixtures?

Homogeneous mixtures are combinations of two or more substances that are evenly dispersed with each other. The components of the mixture retain their own properties. A homogeneous mixture is also know as a solution and can not be separated physically with some sort separation process.

Register to view this lesson

Are you a student or a teacher?

Unlock Your Education

See for yourself why 30 million people use Study.com

Become a Study.com member and start learning now.
Become a Member  Back

Resources created by teachers for teachers

Over 30,000 video lessons & teaching resources‐all in one place.
Video lessons
Quizzes & Worksheets
Classroom Integration
Lesson Plans

I would definitely recommend Study.com to my colleagues. It’s like a teacher waved a magic wand and did the work for me. I feel like it’s a lifeline.

Jennifer B.
Teacher
Jennifer B.
Create an account to start this course today
Used by over 30 million students worldwide
Create an account