Foul Water Lab Report
6/18/2013
Meredith Wells, Ricardo Vasquez, & Sammy Weiser
Summer Chemistry
Dr. Forman
Abstract
Through a lengthy procedure, my lab group and I learned how to purify water. After we sucessfully purified our water, we collected our data and put it into a chart. Then, the rest of the class did the same so we could compile a historgram and compare results.
Purpose, Backround, Significance
The purpose is to filter a sample of foul water to get it clean enough to wash one's hand. Puryfying the water teaches us the process of puryfying water so we can obtain valueable, lifelong skills.
Procedure
1. Make a data table
2. measure the volume of 100 ML of foul water, leave sample in graduated cylander
3. closely observe and describe your sample in the data table
4. let your sample sit for 1 min
5. use a biral pipette to remove the top layer of liquid and put it in a seperate, clean test tube
6. add distilled water to the liquid in the test tube
7. record the amount of liquid left in the graduated cylander
8. dispose of the liquid in the test tube
9. poke small holes in the bottom of a stirofoam cup using a paper clip
10. put a 1 cm layer of gravel, 2 cm layer of sand, and 1 more cm of gravel on top of one another inside the stirofoam cup. makre sure the gravel is premoistened
11. pour your sample into a cup and catch the filtrate in a beaker as it is draning through
12. throw away your sand and gravel that has been used
13. measure the volume of the sample of the filtered water. save the water for your next step in filtering.
14. fold a piece of filter paper into a cone shape
15. put the filter paper into a funnel while you slightly moisten it so it sticks to the sides of the funnel
16.place the funnel in the clay triangle
17. add a teaspoon of charcol to the water
18. pour the water smaple into the flask. swirl it vigoriously, then pour the water into the filter paper
19. pour the water sample into a graduatred cylander and record the final volume, color, and odor of your purified sample
21. listen to your teacher abouot how to dispose of everything
22. wash your hands!
Results
1. 40-49.9% (percent recovery)
2. we lost 63 milliliters of water
3. 39.42% of original foul water sample was lost during purification
4. histogram pic
5. 80-89.9%= largest percent recovery obtained by one of the groups in my class, 40-49.9%= smallest percent revcovery obtained by a group in my class, 40-49.9% is the range of the percent recovery of the smallest and largest amounts of water obtained by the groups
6. 72.83%= mean value
histogram
my indavidual lab group
final result- purified water!
10. put a 1 cm layer of gravel, 2 cm layer of sand, and 1 more cm of gravel on top of one another inside the stirofoam cup. makre sure the gravel is premoistened
11. pour your sample into a cup and catch the filtrate in a beaker as it is draning through
12. throw away your sand and gravel that has been used
13. measure the volume of the sample of the filtered water. save the water for your next step in filtering.
14. fold a piece of filter paper into a cone shape
15. put the filter paper into a funnel while you slightly moisten it so it sticks to the sides of the funnel
16.place the funnel in the clay triangle
17. add a teaspoon of charcol to the water
18. pour the water smaple into the flask. swirl it vigoriously, then pour the water into the filter paper
19. pour the water sample into a graduatred cylander and record the final volume, color, and odor of your purified sample
21. listen to your teacher abouot how to dispose of everything
22. wash your hands!
Results
1. 40-49.9% (percent recovery)
2. we lost 63 milliliters of water
3. 39.42% of original foul water sample was lost during purification
4. histogram pic
5. 80-89.9%= largest percent recovery obtained by one of the groups in my class, 40-49.9%= smallest percent revcovery obtained by a group in my class, 40-49.9% is the range of the percent recovery of the smallest and largest amounts of water obtained by the groups
6. 72.83%= mean value
histogram
my indavidual lab group
final result- purified water!
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