Show:
Pure Substances
Mixtures
Solubility
Homogeneous and Heterogeneous
Saturation
100
What is a pure substance?
A pure substance is not mixed with any other substance or material, and cannot be separated.
100
What is a mixture?
Mixtures are two or more substances that are mixed together but not chemically joined.
100

The larger part of a solution is called this.

Solvent

100
Give an example of a homogeneous mixture
Peanut butter, ice cream, milk
100

How can you describe a saturated solution in qualitative terms?

  • High concentration (amount of solute in solution)

  • Cloudy

  • Solid visible

  • Strong taste

200
What are the two main types of pure substances?
Elements and Compounds
200
What are the two main types of mixtures?
Heterogeneous & Homogeneous
200

The smaller part of a solution that dissolves is called this.

Solute

200

Give 1 example of a heterogeneous mixture.

Trail mix, human body

200

When is a solution saturated?

If the concentration is too high that no more solute can dissolve, it has become a saturated solution

300
The periodic table contains what?
Elements
300
What does homogeneous mean?
When a mixture does mix evenly-appears too look the same throughout.
300

This substance is known as the universal solvent.

Water

300
Give an example of a homogeneous mixture that you cannot physically see, but is all around us.
Air.
300

When is a solution considered unsaturated?

Unsaturated solutions are solutions where more solute can be dissolved (think of it like there’s still more room!)

400
What is a compound? Give an example to support your answer.
A compound is a substance formed when two or more elements are chemically joined (Example: NaCl aka salt)
400
What is a heterogeneous mixture?
A heterogeneous mixture DOES NOT mix evenly, and you can take it apart.
400

The three factors impacting Solubility are...


Temperature, stirring, and particle size

400

What is the difference between heterogeneous and homogeneous mixture?

Homogeneous looks the same throughout and you can't take the mixture apart. Heterogeneous can be taken apart and is very easy to tell the parts of the mixture.

400

How can you describe a solution in quantitative terms?

  • Amount of solute (how much is dissolved)


    • Spoonful (1 spoon of…)

    • Grams (g)

  • Volume of solvent (usually water)


    • millilitres (mL)

    • litres (L)

Ex. “When 4 spoonfuls of sugar are put in 100 mL of water, the solution is saturated!”

500
Give three examples of an element.
Iron (Fe), Sodium (Na), Hydrogen (H) etc...
500
What happens when I combine a solute and a solvent?
You get a solution.
500

Why is water the universal solvent?

Water dissolves more different substances than any other solvent

500

Give an example of a homogeneous mixture that is not a liquid or gas.

A nail used for wood work, chocolate

500

Define concentration. Does a saturated solution have a high or low concentration?

The amount of solute present in an amount of solution

The more solute you have the more concentrated your solution is!