Q:

What is the difference between a pure substance and a mixture?

A:

Quick Answer

A pure substance contains only one kind of molecule, and a mixture is a combination of two or more pure substances. Distilled water, aluminum foil and table sugar are each made from only one type of particle. However, salt water is a mixture because it contains salt as well as water.

Continue Reading
What is the difference between a pure substance and a mixture?
Credit: Steve Debenport E+ Getty Images

Full Answer

Both pure substances and mixtures can exist as solids, liquids or gases. Most ordinary things are mixtures with at least two types of molecules. For example, air is a mixture of pure substances, including nitrogen, oxygen and carbon dioxide. Apple juice is another common mixture that includes particles of water, sugar, flavoring and vitamins.

Learn more about Solutions & Mixtures
Sources:

Related Questions

  • Q:

    Why are alloys used rather than pure metals?

    A:

    Metal alloys, which are a mixture of metal and at least one other substance, are used because they are more suited for a particular task than a pure metal is. Metal alloys are typically either harder, stronger, lighter or more flexible than a comparable pure metal.

    Full Answer >
    Filed Under:
  • Q:

    Is salt water a pure substance or a mixture?

    A:

    Salt water is a mixture, but more specifically, it is a solution. A solution is a mixture where one substance is homogeneously or evenly distributed in the other.

    Full Answer >
    Filed Under:
  • Q:

    What does a suspension refer to in chemistry?

    A:

    In chemistry, a suspension is a heterogeneous mixture in which one substance is dispersed throughout a substance in another phase, and in which the particles of the first substance are between 0.00002 and 0.00004 of an inch in diameter. In order to be a suspension rather than a colloid, the mixture must be capable of sedimentation if allowed to stand. Most suspensions are comprised of solid particles suspended in a liquid, such as paint, blood or muddy water, but they can also consist of liquid particles suspended within a gas, such as an aerosol spray.

    Full Answer >
    Filed Under:
  • Q:

    How do you explain the difference between mixtures and solutions for kids?

    A:

    A precise but simple explanation of the difference between a mixture and a solution is that a mixture is a substance made of other substances that are mixed but not joined together, while a solution is a substance made of two or more substances that do join together. If the kids are older, it should be noted that a chemical reaction takes place to create a solution and that no such reaction occurs in a mixture.

    Full Answer >
    Filed Under:

Explore