Happy Tuesday! 12/04/2012 DO NOW!
description
Transcript of Happy Tuesday! 12/04/2012 DO NOW!
![Page 1: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/1.jpg)
Happy Tuesday! 12/04/2012DO NOW!
1. What are the 4 indicators of a chemical reaction?
2. How is a physical reaction different from a chemical reaction?
3. Label the following “CC” for chemical change or “PC” for physical change:
– Burning– Rotting– Rusting– Melting– Combining baking soda and vinegar
![Page 2: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/2.jpg)
ACTIVATOR - Reactions
• Watch the video and write down any reactions you see.–Are they chemical or physical
changes do you think?
![Page 3: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/3.jpg)
HOT Qs1. Which is only a physical
change? souring or milk
melting of iceburning of oil
rusting of iron
2.Which process involves a chemical change? Photosynthesis
freezing waterboiling water
melting ice
3. In the making an omelet, which process involves a chemical change?
melting butter frying eggs chopping onions stirring eggs
![Page 4: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/4.jpg)
LEQ #8: How are chemical reactions represented in writing?
![Page 5: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/5.jpg)
LEQ #9: What can we do to increase the rate of a reaction?
![Page 6: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/6.jpg)
KEY VOCAB• CHEMICAL EQUATIONS: how scientists
represent chemical reactions
6 CO2 + 6 H2O C6H12O6 + 6 O2
This is a really confusing and stupid way of doing things
because what normal person has any idea
what this means?
LUCKILY…You’re not normal, you’re
chemistry students!
So let’s break it down…
![Page 7: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/7.jpg)
Research
6 CO2 + 6 H2O C6H12O6 + 6 O2
Reactants Chemical Reaction Products
Coefficient Subscript
![Page 8: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/8.jpg)
KEY VOCAB• Reactants: substances that take part in a
chemical reaction What goes in
• Products: substances made during a chemical reaction What comes out
+ =
![Page 9: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/9.jpg)
KEY VOCAB• Coefficient: # of molecules of a compound in a
chemical reaction– Ex: 6 H = 6 molecules of Hydrogen
• Subscript: # of atoms of an element in a compound – Ex: H2O = 2 atoms of Hydrogen in 1 molecule of
water
** REMEMBER – ATOMS MAKE UP MOLECULES **
![Page 10: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/10.jpg)
PRACTICE
2 H202 2 H20 + O2
1.Reactants? 2.Products?3.How many molecules of H20 are in the products?4.How many atoms of Hydrogen are in H202?5.How many atoms of Hydrogen are in the Reactants?
![Page 11: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/11.jpg)
PRACTICE
C3H8 + 5 O2 4 H2O + 3 CO2
1.Reactants? 2.Products?3.How many molecules of H20 are in the products?4.How many atoms of Hydrogen are in C3H8?5.How many atoms of Hydrogen are in the Reactants?
![Page 12: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/12.jpg)
PRACTICE – WORK TOGETHER
4Al + 3 O2 2 Al2O3
1.Reactants? 2.Products?3.How many molecules of Al203 are in the products?4.How many atoms of Oxygen are in O2?5.How many atoms of Oxygen are in the Reactants?
![Page 13: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/13.jpg)
PRACTICE – ON YOUR OWN
6 CO2 + 6 H2O C6H12O6 + 6 O2
1. Reactants? 2. Products?3. How many molecules of C02 are in the reactants?4. How many atoms of Hydrogen are in H20?5. How many atoms of Hydrogen are in the
Reactants?
![Page 14: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/14.jpg)
What in the world is a precipitate?
• http://www.youtube.com/watch?v=8RmVwz2fNGc (shorter)
• OR• http://www.youtube.com/watch?v=JAeOP2Mf
rDY&feature=related (longer)
![Page 15: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/15.jpg)
Finding the main idea and supporting details! (20 min. 4 min/paragraph)
• Read the article about reaction rates.• For each paragraph, write down the main idea
and 2 supporting details• 1 reader and 1 recorder• Reader reads aloud• Recorder writes down the main idea and
supporting details• Switch for each paragraph
![Page 16: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/16.jpg)
Factors that affect the RATE of a chemical change
• Rate—how quickly something happens
![Page 17: Happy Tuesday! 12/04/2012 DO NOW!](https://reader036.fdocuments.us/reader036/viewer/2022081604/56814c1f550346895db922c2/html5/thumbnails/17.jpg)
Factors that affect the RATE of chemical change
• Temperature• Surface area• Concentration