SCI 207 NEW WEEK 2 LAB 2 WATER QUALITY AND CONTAMINATION http://www.homeworkproviders.com/shop/sci-207-new-week-2-lab-2-water-quality-and-contamination/ Lab 2 – Experiment 1: Effects of Groundwater Contamination Table 1: Water Observations (Smell, Color, Etc.) Beaker Observations 1 To me this is just water, there is no smell. 2 As you pour the oil in the water the oil started to bubble at the top. When stirring the oil turned into smaller bubbles. It looks as if the oil has placed a thick line of film on the water 3 After pouring the vinegar in the water the only change I noticed was that the water seemed to be a shade darker when added it.
The crushed coffee grounds would dissolve with the water, forming a solution of water and coffee. However, not all of the coffee beans would dissolve. The insoluble chunks of the coffee beans would remain solid and stay apart from the water. Due to the mixing of the coffee and the water, the solution would take on a brown color and have a distinct smell. 2.
Marked 5 1 cm intervals on line starting 0.6 cm from edge of plate3. Prepared 5 micropipettes to spot plate4. prepared chamber with methylene chloride as solvent using a beaker with ½ sheet of filter paper and covered with aluminum foil.5. Spotted plate left to right with fuorene, fluorenol, fluorenone, unknown 3D, and reference mixture containing all 3 compounds a. used different pipettes to spot plate b. drew up sample by capillary action c. applied light spot (about 2 mm) d. allowed to evaporate6. Developed TLC plate by placing plate in chamber not contacting filter paper.7.
Rf = Ds/Df Ds = Distance traveled by the compound Df = Distance traveled by the solvent Materials: coffee filter, tape, rubbing alcohol, water, 3 different color magic markers (not permanent); 3 identical tall, narrow drinking glasses; metric ruler, 3 pencils Pre-lab Questions: 1. List one extensive and one intensive property of marker ink. Intensive-color Extensive-volume 2. Define mixture. Mixture contains two or more different substances which are only physically bonded.
Since vinegar is an acid, you know that vinegar was not in the solution and it must be something else. You decided to investigate if the new wave of Vitamin Water is pH neutral: neither too acidic nor too basic. Using BTB (bromothymol blue), you select five flavors of Vitamin Water to rest. Three of the flavor-samples turn a murky green, indicating the likelihood of acid/base balance. Of the two remaining, one turns slightly yellow, while the other remains blue.
Adding distilled water to the solution lowers the initial intensity of the blue color, bringing back to a lighter blue. Applying heat to this solution changes it’s color from blue to green to eventually turning black. After boiling, black precipitate can be identified, which is what gave the solution it’s black color. Once the precipitate begins to settle on the bottom of the beaker, the liquid solution can be observed as being clear. Some of the black precipitate becomes stuck to the side of the beaker as it’s being stirred and some of the liquid being vaporized.
Vacuum-assisted, in which wastewater is pulled from the toilet. 8. Why were older versions of low-flow showerheads unpopular? How have the new ones improved? a small washer was inserted between the water supply line and the existing showerhead.
12.18 (A) Which of the six wells in Figure 12.25 in chapter 12 should be flowing artesian wells? Wells 4, 5, and 6. In Figures 12.19A and B, two depressions are occupied by water, whereas others are dry. 12.19 (A) Explain this presence and absence of ponds in these two figures. The presence of ponds in the figures is seen where there is impermeable soil that
Lab 2: Water Quality and Contamination Name SCI 207 Instructor Date Lab 2 - Experiment 1: Effects of Groundwater Contamination |Table 1: Water Observations (Smell, Color, Etc.) | |Beaker |Observations | |1 |To me this is just water, there is no smell. | |2 |As you pour the oil in the water the oil started to bubble at the top.| |
Some scientists say no. Soap comprises of an acid – fatty acids and triglycerides, and a base – sodium hydroxide and has two main functions: to decrease the surface tension and to bind together dirt, oil and bacteria; it contains hydrophilic molecules which allow hydrophobic substances such as dirt and