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Unit 1- States of Matter Notes

Unit 1- States of Matter Notes. In relationship to density. Remembering the first day of school. “Knowing the volume of the gases would be helpful.” anonymous chemistry student How can we determine the volume of an unpressurized gas?. Particle diagram illustrating density.

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Unit 1- States of Matter Notes

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  1. Unit 1- States of Matter Notes In relationship to density

  2. Remembering the first day of school “Knowing the volume of the gases would be helpful.” anonymous chemistry student How can we determine the volume of an unpressurized gas?

  3. Particle diagram illustrating density What substance has the greatest density and how do you know?

  4. Density Must Knows The density of a substance is not dependent on the amount. Gold 19.3 g/ml

  5. Particle diagrams of state of matter? 17.31 g/cm3 19.30 g/cm3

  6. Particle diagrams of state of matter?

  7. Particle diagram illustrating density

  8. Water is Weird

  9. Water is Weird Key Concept 1: Water is weird because water is the only substance that is more dense in a liquid state than in a solid state.

  10. What gas could we use?

  11. Key Concept 2: Desk Pod Discussion Questions • To determine the density of carbon dioxide what variables would we need to collect? • Should this experiment be done in an open or closed system? Explain why? • How can we determine the mass of the carbon dioxide produced? • How can we determine the volume of carbon dioxide produced?

  12. Key Concept 3: Askew’s Data for the Density of a Gas

  13. End of Day

  14. Density of a Gas • Start Lab…Get going…. • Be productive • Aprons and Safety Glasses

  15. Key Concept 3: Class Data for the Density of a Gas

  16. Carbon Dioxide Accepted Values The accepted value of the density of carbon dioxide gas is 0.002 g/ml. The accepted value of dry ice (solid carbon dioxide) is 1.5 g/ml.

  17. Particle Diagram for States of Matter Key Concept 4: Solid vs. Gases at the particle level (volumes equal)

  18. Unit 1- Physical Properties of Matter is Wrapping Up • Friday- Finish Notes for Unit 1! If time allows review practice problem C. • Monday- Work on density calculation- practice problems D. • Tuesday and Wednesday- Class time for Study Guide • Thursday- Unit 1 Exam

  19. Unit 1 Study Guide • We’ll be posted on the Web-site later today if you would like to start working on it over the weekend. It will be collect for practice points. You will receive a hard copy in class on Monday. • Prove It Quiz 3- Pass out on Thursday (Exam Day). The last time to take quiz 2 is Thursday morning.

  20. Quick Demos Key Concept 5: Carbon dioxide vs. Air Demo Density: CO2 Air Physical Property of Carbon dioxide: Chemical Property of Carbon dioxide: • A physical property is an aspect of matter that can be observed or measured without changing it. Examples of physical properties include color, molecular weight, and volume. • A chemical property may only be observed by changing the chemical identity of a substance. This property measures the potential for undergoing a chemical change. Examples of chemical properties include reactivity, oxidation states and flammability.

  21. Quick Demos Key Concept 6: ? vs. Air Demo Density: ? Air Physical Property: Chemical Property: Particle diagram to represent this demo.

  22. Quick Demos Key Concept 7: Hexane vs. Air Demo Density: C₆H₁₄ Air Physical Property: Chemical Property:

  23. Mass and Change Lab

  24. Mass and Volume Lab

  25. Density of a Gas Quick Lab

  26. Practice Problems C & D • Practice Problems C- Conceptual • Practice Problems D- Calculations

  27. Density Calculations Key Concept 8: What is the weight of the ethyl alcohol that exactly fills a 150.0 mL container? The density of ethyl alcohol is 0.789 g/mL. Key Concept 9: A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?

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