Date Performed: 9/25/2012 Joe Shmoe
Date Submitted: 9/26/2012
Lab TA: Blankity Blank
Purpose: The purpose of this experiment is to learn about the various processes by which water is processed and treated. This experiment will involve removing chemical impurities in water through using techniques such as absorption spectrophotometry, sample collection, serial dilution, filtration PH and graphical analysis. If this experiment is done properly the water sample collected from the pond should wind up purified and have a purity percentage close to 100%.
Procedure: The steps of this experiment can be found in the Lab Manual. Dillon, Stephanie. “The Purification of Water.” Laboratory Manual. Pearson Publishing, 2012, pp. 211-215. The water sample was collected in the pond by Arbor View Appartments on September 24th, 2012 at 3:41 pm. Team members involved in this experiment were Jenna, Anne and Joey.
Data and Results:
Five Standard Solutions:
Solution| Phosphate Concentration| Absorbance Level|
1| 1.05 *10^-4 M or 9.975 ppm| 0.525|
2| 8.4 *10^-5 M or 7.98 ppm| 0.339|
3| 6.3 *10^-5 M or 5.985 ppm| 0.247|
4| 4.2*10^-5 M or 3.99 ppm| 0.163|
5| 2.1*10^-5 M or 1.995 ppm| 0.074|
Phosphate Concentration Before Purification| Phosphate Level After Purification| Absorbance Level before purification| Absorbance level after purification| PH before| PH After| 8.52*10^-1 M or 0.144 ppm| 1.056 M or 2.05 ppm| -0.046| 0.057| 6| 8|
The sample was collected from a pond at Arbor View Appartment properties. Unfortunately it was impossible to get water from the middle of the lake twelve inches below the surface and the water had to be collected from the edge of the pond and mostly surface water was collected. After the CaO and Al2SO4 were added to the sample, the water became white and cloudy and the powder fell to the...