Pure Substances, Mixtures and Solutions. Bellringer.
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Transcript of 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.