CHEMISTRY 12-13'
Friday, May 10, 2013
Thursday, April 18, 2013
Tuesday, March 26, 2013
Monday, March 4, 2013
Gas Behavior
In the gas behavior lab we had three different lab the first one Temperature vs. Volume, Volume vs. Pressure, and Pressure vs. Temperature.
All of these have there own law.
Boyle's Law- Is when pressure is up, volume is down.
Guy- Lussac's Law- Temperature is up, pressure will be up.
Charle's Law- Volume is up, temperature up.
This lab we did Temperature vs. Volume. We used a test tube that was hooked up to a temperature probe. We started the syringe at 10cc. Then we placed it in a ice cold cooler. The temperature of it was zero degrees Celsius. We watch as the syringe's piston moved in this case it move down a degree. After that we waited till the syringe got back to room temperature. Then we put it in a hot water tube, this was eighty degrees Celsius. The hot water made the syringe piston move up to 15cc. Finally we put the syringe in warm water, it was about fifty degrees Celsius. And the piston move up one degree.
The final lab we did was Pressure vs. Temperature. For this we used a computer, pressure sensor, and a test tube. We place the test tube into the hot bath which was 80'C and then to a ice bath 0'C. After those we places it into a Warm bath which was 50'C. This graph shows you how temperature affect the pressure of it.
Wednesday, February 13, 2013
AgNo3 + Cu Lab
I had a lot of fun during this lab. We watch as the copper wire changed. Then we seen how it reacted with the silver. After everything we were able to find the percent error of the silver and the copper.
Monday, January 28, 2013
POPCORN & CRYSTAL LAB
In these labs we found out the percent of water in the popcorn kernel and the crystal. On both labs we used a Bunsen Burner. We were able to find the percent of water by using the hydrate formula.
Sunday, January 20, 2013
6.02x10^23
In our lab we had to figure out what element each cup was. We had to do this by finding the atomic mass for each of the different cups. We weighed the number of grams that the cup held. Then we took the number of grams and divided by the number of moles and got the atomic mass of an element. We then used our periodic table to figure out which element we had. And that is how we found out the element. Down below is a chart where we check if our element was correct.
9.44 c
31.53 g
53.90 d Here is the number of grams we got for each letter.
15.10 f
28.30 b
45.55 h
20.74 e
25.80 j
32.60 I
4.87 a
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