Monday, October 24, 2011
Thursday, October 20, 2011
Saturday, October 15, 2011
ADV 1.4: Practice Problems with Answer Key
Just follow this link. There are some good practice problems for 1.3 and 1.4 with an answer key if you scroll down.
http://www.dusd.net/staff/rcramm/Chemistry/Unit_8/Limiting_Reactant_Worksheet.pdf
http://www.dusd.net/staff/rcramm/Chemistry/Unit_8/Limiting_Reactant_Worksheet.pdf
Thursday, October 13, 2011
Tuesday, October 11, 2011
Monday, October 10, 2011
Physical and Chemical Change Lab: Part 3
Before: NaCl on the left, AgNO3 on the right
Before: NaCl in water
After
Before: NaCl in water
After
Thursday, October 6, 2011
Wednesday, October 5, 2011
ADV 1.3: Calculating Limiting and Excess Reactant Video
This is a different look at the LR and ER problems we've been doing. He takes a different approach to finding the limiting reactant. I personally like my way better to doing that (hmmm...) because I think that it's much less complicated. But it's interesting, and good practice for finding how much of the excess reactant is left over -- something all of you could use a little extra practice with. :)
Tuesday, October 4, 2011
Liquid Nitrogen KABOOM
Liquid Nitrogen boils at -192 degrees Celsius. When it boils inside of a 2 liter pop bottle, it expands rapidly and the gas creates so much pressure on the bottle that it explodes into a million pieces:
Liquid Nitrogen Graham Crackers
Liquid Nitrogen enters into a graham cracker's pores. When you pull it out of the liquid nitrogen, it boils as soon as it comes into contact with the air. It uses the heat energy from the graham cracker to do this, making the cracker VERY cold. It gets so cold, in fact, that when you eat one, your breath condenses as water vapor, making it look like you are breathing smoke!
Monday, October 3, 2011
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