crystal lab*

MATERIALS:

Distilled water
 Aluminum Potassium Sulfate
 beaker
hot plate
string 
 stick
food coloring


I added 60-100mL of distilled water in a beaker. I put the beaker on a hot plate. Then I started adding more and more aluminum potassium sulfate, and stirred it. After that, then I injected dark green food coloring inside the substance. As it started to boil I added more sulfate. Then let it cool down, took the beaker off the hot plate and let it sit over night. By the next day a crystal had formed! :)

Silver/ Copper Replacement lab*

Damien, Sam, Kendra, and I got a 30cm piece of copper wire cleaned it off, coiled it, and put it in a test tube. Our coil weighed 3.443 grams. We poured .995 grams of silver nitrate into the test tube with the copper wire. Then we added distilled water up to 2 cm from the top of the test tube. We covered the test tube with parafilm, and waited a few days. After waiting , we weighed a piece of filter paper to be 1.45 grams, and set it up with a funnel to separate the the silver. We removed the silver, copper, and waste from the tube. We got as much silver as we possibly could onto the filter paper, the waste in another beaker, and the copper coil we let dry on a paper towel. We let everything dry overnight. The next day we measured the copper to be 3.227 grams, and the filter paper/silver to be 2.175 grams. This means that .216 grams of copper reacted with the silver nitrate, and produced .455 grams of silver.

Determining the Concentration of a Solution: Beer's Law

The primary objective of this experiment is to determine the concentration of an unknown nickel (II) Sulfate solutions that we made combining different amounts of the Nickel (II) Sulfate and water to determine how much light the solution absorbed. The machine, colorimeter will measures how much light passes through a liquid or how much light that liquid absorbs,  by taking different amounts of distilled water and Nickel (II) Sulfate solutions.




MATERIALS:


power macintosh
logger pro
1 cuvette
5 20 X 150 mm test tubes
tissue
stirring rod
30 ml of 0.40m NiSo
5 ml of NiSo 4
2 10ml pipets
pipets pump
bulb
distilled water
test tube rack
2 100ml beakers

Trial Number	0.40 M NiSO4 (mL)	Distilled H2O (mL)	Concentration (M)
1	2	8	0.08
2	4	6	0.16
3	6	4	0.24
4	8	2	0.32
5	10	0	0.40

DATA AND CALCULATIONS:



TrialConcentration (mol/L)Absorbance 10.080.124 20.16.238 30.24.714 40.32.740 50.40.880 6Unknown 3.661 Concentration of Unknown0.24 mol/L