Mixtures

What is a colloid?

• A mixture that does not settle into its component parts once it has been mixed, no matter how long it sits.

• A type of mixture where liquid particles are dispersed into another liquid, often with the help of another binding substance.

• A mixture where the particles of a solid disperse but eventually settle at the top or bottom of the mixture over

  time.

• A mixture with two substances that mix evenly. The one substance completely dissolves into the other.

What is an emulsion?

• A mixture that does not settle into its component parts once it has been mixed, no matter how long it sits.

• A type of mixture where liquid particles are dispersed into another liquid, often with the help of another binding substance.

• A mixture where the particles of a solid disperse but eventually settle at the top or bottom of the mixture over

  time.

• A mixture with two substances that mix evenly. The one substance completely dissolves into the other.

What is a suspension?

• A mixture that does not settle into its component parts once it has been mixed, no matter how long it sits.

• A type of mixture where liquid particles are dispersed into another liquid, often with the help of another binding substance.

• A mixture where the particles of a solid disperse but eventually settle at the top or bottom of the mixture over

  time.

• A mixture with two substances that mix evenly. The one substance completely dissolves into the other.

What is a solution?

• A mixture that does not settle into its component parts once it has been mixed, no matter how long it sits.

• A type of mixture where liquid particles are dispersed into another liquid, often with the help of another binding substance.

• A mixture with two substances that mix evenly. The one substance completely dissolves into the other.

• A mixture of two or more substances in the same phase that is uniform throughout.

Answer explanation

Remember, all solutions are homogeneous (a mixture of two or more substances in the same phase that is uniform throughout), but not all homogeneous mixtures are solutions (where the one substance completely dissolves into a liquid).

For example, air is a homogeneous mixture of a variety of different kinds of gas particles, but we would not call it a solution. Solutions are in the liquid phase of matter.

What is a heterogeneous mixture?

• A mixture with two substances that mix evenly.  The one substance completely dissolves into the other.

• A mixture that does not settle into its component parts once it has been mixed, no matter how long it sits.

• A mixture of two or more substances that are not in the same phase, or one where the mixture is not uniform throughout.

• A mixture of two or more substances in the same phase that is uniform throughout.

What is a homogeneous mixture?

• A mixture with two substances that mix evenly.  The one substance completely dissolves into the other.

• A mixture that does not settle into its component parts once it has been mixed, no matter how long it sits.

• A mixture of two or more substances that are not in the same phase, or one where the mixture is not uniform throughout.

• A mixture of two or more substances in the same phase that is uniform throughout.

Answer explanation

Remember, all solutions are homogeneous, but not all homogeneous mixtures are solutions. For example, air is a homogeneous mixture of a variety of different kinds of gas particles, but we would not call it a solution. Solutions are in the liquid phase of matter.

What is a mixture?

• This contains more than one type of particle.

• This is made of exactly one type of particle.

Answer explanation

Substances that are made of exactly one type of particle are pure substances (eg. gold is only made of gold atoms; salt is only made of NaCl molecules.)

Substances that are made of two more particles are said to be mixtures (eg. apple juice is homogeneous mixture, granola is a heterogeneous mixture.)

What is a pure substance?

• This contains more than one type of particle.

• This is made of exactly one type of particle.

Answer explanation

Substances that are made of exactly one type of particle are pure substances (eg. gold is only made of gold atoms; salt is only made of NaCl molecules.)

Substances that are made of two more particles are said to be mixtures (eg. apple juice is homogeneous mixture, granola is a heterogeneous mixture.)

What is separation?

• A mixture with two substances that mix evenly. The one substance completely dissolves into the other.

• The process of removing one part of a mixture from the rest by taking advantage of differences in their physical properties.

• A mixture where the particles of a solid disperse but eventually settle at the top or bottom of the mixture over

  time.

• This contains more than one type of particle.

Milk is an example of a heterogeneous mixture.

• True

• False