Pure Substances and Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. It can be an element or a compound.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties and can be separated by physical means.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non-uniform composition with distinct phases or components.

Front

Can the properties of a compound be the same as those of its constituent elements?

Back

No, the properties of a compound are different from those of its constituent elements.

Front

What is an example of a homogeneous mixture?

Back

An example of a homogeneous mixture is saltwater, where the salt is completely dissolved in water.

Front

What is an example of a heterogeneous mixture?

Back

An example of a heterogeneous mixture is a salad, where the individual ingredients can be seen and separated.

Front

What method can be used to separate components of a mixture?

Back

Physical methods such as filtration, distillation, or centrifugation can be used to separate components of a mixture.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio.

Front

Is air a homogeneous or heterogeneous mixture?

Back

Air is considered a homogeneous mixture because its composition is uniform throughout.

Front

What is the significance of the ratio of elements in a compound?

Back

The ratio of elements in a compound determines its chemical properties and behavior.