pure substances, mixtures and solutions. bellringer

Pure Substances, Mixtures and

Solutions

Bellringer

Today’s Agenda

1. Bellringer

2. Review : Elements & Compounds

3. Todays’ Objective & Journal Entries

4. Brain-Pop Video

5. Notes

6. Classify This

7. Venn Diagram

8. Exit Slip – Check for mastery

Classes of Matter•Mixtures•Solutions•Elements- review

•Compounds - review

Review- Elements

1. Element– composed of identical atoms and it is

in its purest form.

– EX: copper, aluminum, oxygen

Review- Compounds

• 2. Compounds are made up of 2 or more different elements.

• (cells are classified as compounds too)

• Example: water, carbon dioxide, nitrogen oxide , cells

Today’s Objective

Benchmark:SC.8.P.8.9

Students will: Analyze the properties of substances to

determine if they are mixtures or pure

substances.

Journal Entries Unit 2 – Lesson 4

Date Entry Page Number

Unit 2-Day 4 - Pure Substances, Mixtures,

and Solutions

Brian Pop

• Compounds and Mixtures

• http://www.brainpop.com/science/matterandchemistry/compoundsandmixtures/

Brain teaser question: What is the difference between a compound and a

mixture?

Classes of Matter•Mixtures•Solutions•Elements•Compounds

Vocabulary1.Mixture2.Heterogeneous3.Homogeneous4. Solution5. Solvent6. Solute

Mixtures3. Matter that consists of ________________________________________________

two or more substances mixed together but not chemically combined.

Mixtures•4. Can be separated by _______ ______.

•Ex: Cereal, Sand, Ex: Cereal, Sand, Soil, Concrete, Soil, Concrete, Salad DressingSalad Dressing

physical means

Properties of Mixtures

•5. Substances in a mixture keep most of their own properties.– ___________

Sugar-Sugar-waterwater

•6. In a mixture: Substances do not change in chemical composition (no new substance is formed)

Classify these examples as a compound or a mixture:1. Air in the atmosphere:

Classify these examples as a compound or a mixture:

• 2. Water

Classify these examples as a compound or a mixture:

• 3. Glass

Heterogeneous Mixture

•7. A mixture that ____________________________________does not appear to be the same throughout.•Sand and WaterSand and Water

•CerealCereal•Oil and WaterOil and Water

Homogeneous Mixture

•8. A mixture that appears to be the same throughout.

•Remains constantly and uniformly mixed.•Salt WaterSalt Water

•Sugar Sugar Water (Kool-Water (Kool-

Aid)Aid)

Solutions•“9. _________” of all

mixtures•Not easily separated by physical means

•Koolaid,Koolaid,Lemonade, Salt WaterLemonade, Salt Water

best mixed

Solutions10. Solute

–the

substancethat is

dissolved

11. Solvent – the

substance that does

the dissolving

If I mix sugar into water..

• What is the Solute?

• What is the Solvent?

Pure Substance12. A pure substance is a chemically combined material

that has consistent properties throughout the sample.

Examples (Elements & Compounds): tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate).

Elements Compounds Heterogeneous Homogenous

Left Side : Classify This In your journal you will create a T chart to classify each

object as either an element, compound, or mixture

Pure Substances Mixtures

1. Oxygen 3. Koolaid2. Nitrogen Dioxide

4. Salt Water 5. Blood Cells6. Lemonade

7. N28. Cereal

Elements Compounds Heterogeneous Homogenous

Pure Substances Mixtures

1. Oxygen

7. N2

2. Nitrogen Dioxide

5. Blood Cells

3. Koolaid

4. Salt Water

6. Lemonade

8. Cereal

Left Side : Venn Diagram and Exit Slip Answers

Right Side : Exit Slip Questions

Left Side : Exit Slip Answers

Left Side Extension:

• List five examples of mixtures you observed today.

• List five examples of pure substances you observed today.

• List five examples of solutions you observed today.