combination of two or more substances in which each substance retains its properties

• element

• compound

• mixture

• pure

Mixtures can be liquid, solid, gas, or any combination of the three

• True

• False

Which of the following is NOT a mixture?

• Air

• Tap water

• Gold

• Iced tea

Which of the following can be found in tap water?

• calcium, magnesium, fluorine, iron

• Chlorine disinfectants

• Dissolved oxygen, nitrogen, and carbon dioxide ga

• All can be found in tap water

Fluoride in tap water is good for

• your teeth

• your blood vessels

• your skin

• your hair

In a mixture, each substance retains its chemical identity

• True

• False

Forming a mixture is considered a __________change whereas the formation of a compound is a _________change

• physical, physical

• chemical, chemical

• chemical, physical

• physical, chemical

The components of mixtures can be separated from one another by taking advantage of differences in the components’ __________ properties.

• physical

• chemical

What best describes how filtration separates mixtures?

• filtration takes advantage of different boiling points

• large, solid particles cannot pass through filter paper

• liquids cannot pass through filter paper

• solids melt, leaving the liquid behind

Propanol boils at 97°C and water boils at 100°C. If you wanted to distill the propanol from the mixture, what temperature should you use?

• 97 C

• 100 C

• 212 F

• 197 C