Classifying Pure Substances and Mixtures

The video tutorial by Mr. Millings covers the classification of matter into pure substances and mixtures. Pure substances are defined as elements or compounds, requiring chemical processes for separation. Mixtures, on the other hand, are combinations of pure substances that can be separated physically. The video further distinguishes between homogeneous mixtures, which are uniform throughout, and heterogeneous mixtures, which are not. Examples of each type are provided, and a schematic is introduced to help classify different substances.

What are pure substances classified as?

• Elements and mixtures

• Compounds and mixtures

• Elements and compounds

• Mixtures and solutions

Which of the following is an example of a pure substance?

• Crude oil

• 14-karat gold

• Air

• 24-karat gold

What is required to separate compounds?

• Physical process

• No process needed

• Mechanical process

• Chemical process

Which of the following is a mixture?

• Carbon dioxide

• Silver

• Air

• Water

What is a homogeneous mixture also known as?

• Suspension

• Compound

• Solution

• Colloid

Which of the following is a homogeneous mixture?

• Fruit salad

• Oil and vinegar

• Gatorade

• Concrete

What type of mixture is a fruit salad?

• Homogeneous

• Heterogeneous

• Colloid

• Suspension

What is a suspension?

• A solution with dissolved particles

• A homogeneous mixture with particles between 1 and 1000 nanometers

• A compound with chemically bonded elements

• A heterogeneous mixture with particles greater than 1000 nanometers

Which of the following is an example of a suspension?

• Vinegar

• Orange juice with pulp

• Distilled water

• Tap water

What type of mixture is the Pacific Ocean?

• Suspension

• Heterogeneous

• Colloid

• Homogeneous