Mixtures

Question 1

Mixtures (Impure Substances)

Answer 1

2 or more pure substances not chemically joined

Question 2

Homogeneous Mixture

Answer 2

Completely uniform in composition

• Same throughout
• One phase (layer)

Question 3

What are Homogeneous mixtures called?

Answer 3

Solutions

• Solute: what is being dissolved
• Solvent: what is doing the dissolving

Question 4

What are some examples of homogeneous mixtures?

Answer 4

• Sugar water (solid dissolved in liquid)
• Air (gas dissolved in gas)
• Alloy (solid dissolved in solid)
• Shaving Cream (gas dissolved in liquid)

Question 5

Heterogeneous Mixtures

Answer 5

Not uniformed in composition

• Not the same throughout
• More than 1 phase (layer)

Question 6

Suspension

Answer 6

Separate on their own

• particles separate by mass
• heavier on the bottom

Question 7

Colloid

Answer 7

Does not separate own their own

• particles are mixed together but not dissolved
• stay permanently suspended
• will not separate upon standing

Question 8

How can mixtures be identified and classified?

Answer 8

Homogeneous and Heterogeneous

Question 9

What are some examples of colloids?

Answer 9

• Jello
• Fog
• Clouds
• Smoke
• Paint
• Marshmallows
• Butter

Question 10

Tyndall Effect

Answer 10

Used to differentiate between a true solution and a suspension or colloid

• Solution: ions and molecules are too small to scatter visible light
• Suspension/ Colloids: the particles are too large to be dissolved and are large enough to scatter light