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– http://blog.wsd.net/ketaylor/

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

Lab Safety with Fire

• Goggles• Everything pulled back• Containers not facing anyone• Glass & metal get hot• Thermometers• Alcohol Burners

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

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?

Phase Changes

• http://www.harcourtschool.com/activity/states_of_matter/

PHYSICAL PROPERTYDraw 1 example of a physical propertyExplain why it is a physical property

CHEMICAL PROPERTYDraw 1 example of a chemical propertyExplain why it is a chemical property

PHYSICAL CHANGEDraw 1 example of a physical changeExplain why it is a physical change

CHEMICAL CHANGEDraw 1 example of a chemical changeExplain why it is a chemical change

Evidences of Chemical Rxns

• http://www.buzzfeed.com/awesomer/coolest-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

Physical change

Physical change

Chemical change

Chemical 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

Property

Property

Change

Change

Change

Property

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