Pure Substances and Mixtures

These flashcards cover key concepts regarding pure substances and mixtures for exam preparation.

What is a pure substance?

A pure substance is composed of one single type of matter or element that has specific properties.

Give two examples of pure substances.

Water and diamonds are examples of pure substances.

What happens to a pure substance during a physical change?

The composition of the pure substance does not change.

What is a mixture?

A mixture is a combination of two or more pure substances.

What are the two types of mixtures?

The two types of mixtures are homogeneous and heterogeneous.

What is a homogeneous mixture?

A homogeneous mixture is one where the components are not visible to the eye.

Give two examples of homogeneous mixtures.

Water with salt and chocolate milk are examples of homogeneous mixtures.

What is a heterogeneous mixture?

A heterogeneous mixture is one where the components can be seen with the naked eye.

Give an example of a heterogeneous mixture.

A salad made of tomato, lettuce, and corn is an example of a heterogeneous mixture.

What type of mixture is a chocolate milkshake?

A chocolate milkshake is a homogeneous mixture.

What type of substance is water?

Water is a pure substance.