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9/19 Warm Up

9/19 Warm Up. Question #2: Copy and answer the following: “Donuts” PC = (list 2 physical changes) CC = (list 2 chemical change) Evidences = (list 2 evidences of a chemical rxn ). Announcements. Friday HW: Go to blog and watch MOTHBALL PRE LAB Check survey when completed

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9/19 Warm Up

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  1. 9/19 Warm Up • Question #2: Copy and answer the following: • “Donuts” • PC = (list 2 physical changes) • CC = (list 2 chemical change) • Evidences = (list 2 evidences of a chemical rxn)

  2. Announcements • Friday HW: Go to blog and watch • MOTHBALL PRE LAB • Check survey when completed • http://blog.wsd.net/ketaylor/ • Weds 9/25: Parent/Teacher Conf • Thurs 9/26: 1st TEST

  3. Lab Safety with Fire • Goggles • Everything pulled back • Containers not facing anyone • Glass & metal get hot • Thermometers • Alcohol Burners

  4. Extra Credit Opportunities • https://docs.google.com/a/wsdstudent.net/file/d/0B3U6xsVWibrQMGFvNXMwd0t3RUE/edit?usp=drive_web&pli=1 • See me or blog for info

  5. Dry Ice Lab Questions • Here is the equation from the Bromo & Dry Ice? C27H28Br2O5S + CO2C28H28Br2O7S • What was the evidence a chemical reaction occurred with the Bromo. Blue solution? • What was the evidence a chemical rxn occurred with the phenol red? • What was a physical change that occurred?

  6. Phase Changes • http://www.harcourtschool.com/activity/states_of_matter/

  7. Evidences of Chemical Rxns • http://www.buzzfeed.com/awesomer/coolest-chemical-reactions • Think of the evidences for the chemical rxns

  8. REVIEW: To yourself, answer if the examples are physical changes or chemical changes • Tearing paper • Burning paper • Breaking wood • Campfire • Mixing kool aid • Cooking a cake • Heating H2O boils Physical change Chemical change Physical change Chemical change Physical change Chemical change Physical change

  9. Property or Change? • Liquid has a boiling point • 2 different liquids mix  bubbles • Food coloring can mix with water • Burning an egg • It has a yellow color • It produced a smell • Non-flammable • Hardness of 7 Property Change Property Change Property Change Property Property

  10. Which of the following is an example of a chemical property of water? • A. Boils at 100 C • B. Is transparent • C. Has no odor • D. Reacts with calcium Is it still water (H2O) Transparent = see through/clear No smell Reacts = chemical reaction

  11. Which of the following is an example of a physical property of hydrogen? It • A. Is less dense than air • B. Reacts with oxygen • C. Is highly flammable • D. Forms hydrochloric acid PHYSICALPROPERTY

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