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

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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 – Weds 9/25: Parent/Teacher Conf Thurs 9/26: 1 st TEST

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

Extra Credit Opportunities e/d/0B3U6xsVWibrQMGFvNXMwd0t3RUE/edi t?usp=drive_web&pli=1 e/d/0B3U6xsVWibrQMGFvNXMwd0t3RUE/edi t?usp=drive_web&pli=1 See me or blog for info

Dry Ice Lab Questions Here is the equation from the Bromo & Dry Ice? C 27 H 28 Br 2 O 5 S + CO 2  C 28 H 28 Br 2 O 7 S 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?

Phase Changes s_of_matter/ s_of_matter/

PHYSICAL PROPERTY Draw 1 example of a physical property Explain why it is a physical property CHEMICAL PROPERTY Draw 1 example of a chemical property Explain why it is a chemical property PHYSICAL CHANGE Draw 1 example of a physical change Explain why it is a physical change CHEMICAL CHANGE Draw 1 example of a chemical change Explain why it is a chemical change

Evidences of Chemical Rxns chemical-reactions chemical-reactions Think of the evidences for the chemical rxns

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

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

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

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 PHYSICAL PROPERTY