Heats of Solution and Reaction Name: Cindy Hernandez Purpose: The purpose of this experiment is to decided if the chemical reactions are exothermic and endothermic. By finding the differences between each temperature. Overview: For this lab, we had three different chemicals involved NH4Cl, H2SO4, and NaOH. What we did with these chemicals was that we added water, except NaOH we added HCl, was that we combined both mixtures to determine if there was a temperature change. The reason why we're determining if their was a chemical reaction is to identify if it is exothermic or endothermic.
Water from a variety of sources that receive precipitation is being sampled. Using a pH meter, the pH of water samples is being measured. In the first approach using titration methods in combination with pH measurement, the volumes of sulfuric acid needed for reaching two different pH levels are being measured. Difference in the volume of sulfuric acid used, is an equivalent for the amount of CaCO3 expressed in grams per (gL-1) in the analyte. Therefore the alkalinity of water samples is being calculated.
Abstract The objective of the south street seaweed experiment is to make a tincture of iodine. Iodine is used commercially as an antiseptic on cuts and scrapes of the skin. Conceptually, one of the active ingredients of the tincture, iodide, can be extracted from seaweed. By adding the seaweed to water and applying heat energy into the mixture, we were able to extract iodide. After adding Iodine salts, and filtering the mixture our next goal was to test for three important chemicals that must exist in our mixture for it to be a true iodine tincture; Iodine, Iodide Ion and the triiodide ion.
| Since that time, some additional work has been done on veblens, and we understand them a little better. As I said, they are hills of sand or gravel that were deposited by relatively forceful upward flows of groundwater. The upward water flows had to have been with sufficient force to transport fairly coarse materials, in some cases rocks up to 3 or 4 inches in diameter. The only other geologic features that might be mistaken for veblens are glacial hills known as kames. However, kames consist of gravel and sand deposited by streams that flowed into holes in the glacial ice, depositing sediment in the holes.
The uplift was surrounded by an epicontinental sea where sediment accumulated in marine margins creating sandstones, siltstones and limestones throughout the Basin. Facies 1 in the carbonate unit consists of 4-34 cm beds of black micrite, matrix supported with less than 5-10% grains making it a mudstone; crystalized shell fragments are present, 2-4 mm bivalve bioclasts and sparse 3-5 cm rugose coral and crinoid fragments; horizontal inclined burrows are
Pre Lab Objective: The purpose of this lab is to obtain the mass and volume of two different metal samples, to graph data, to obtain the slope of graphed data and to display a best fit curve of experimental data in order to graphically determine the density of each metal Background: Understanding the relationship that exists between a substance’s mass and its volume. This relationship is expressed by the physical property called density. (D = M/V). In order to determine the volume of solids, a technique called water displacement is used. A fixed amount of water is added to a graduated cylinder and the volume of water is recorded.
The clean up approach for OU4 was to allow the clean up of the other operable units to address the contamination of the wetlands. This would be done with periodic environmental
Hagg Lake, with a storage capacity of 53,600-acre feet, is the impoundment created by Scoggins Dam. Hagg Lake water is currently used for river flow restoration, municipal water supply and agricultural irrigation needs throughout the Watershed. The reservoir has park and recreation facilities operated by Washington County. The Water Supply Feasibility Study addresses aspects of raising Scoggins Dam by 20-feet and by 40-feet. Raising Scoggins Dam would affect tributaries to Hagg Lake as well as Scoggins Creek downstream of Scoggins Dam.
Fluoridation of Public Water Supplies Lisa M Sauvan Troy University Abstract This paper will evaluate the arguments, both for and against the fluorination of the public water supply. Amongst the discussion will be the history as to why fluorination of city water began, what benefits were intended to come from it, and how these benefits were to be tested. Finally, an analysis of how the human body metabolizes fluoride, as well as signs and symptoms of both toxicity and deficiency will be provided in support of derived conclusions. Fluoridation of Public Water Supplies Since the discovery of fluoride in the early 1900s, major and smaller cities alike around the United States have been adding fluoride to the public water supply. This has been done in an effort to reduce dental carries in the population and improve overall oral hygiene.
Studies have been done, from measuring the effects on drinking water to monitoring seismic events related to fracking. While the validity and interpretation of these studies can be brought under scrutiny depending on the viewpoint of the respective group, the mining of the required silica sands and the damages it is ensuing on the environment must be taken into