Therefore the alkalinity of water samples is being calculated. In the second approach, the two volume readings for the respective amounts of sulfuric acid used are being determined an indicator based method. Congo red and bromocresol green are being used as the indicators. Procedure (Outline provided as pre-lab): A. The pH meter was calibrated using standard pH solutions provided.
Hospital's owners Castlebeck, apologised and suspended 13 employees. NHS South West said it was "appalled" and the Care Quality Commission said there was an "unforgivable error of judgement" in not investigating earlier abuse claims. Hillcroft Care Home, Lancashire - Research In October 2012 six care workers were arrested in connection with abuse in Hillcroft Care Home near Lancashire. The police were called into the home of May that year, after a complaint from staff. Five nurses and one matron
Hydrate Lab The purpose of this lab is to analyze the percent water in a crystalline hydrate and to indentify the hydrate from a list of possible unknowns. The solid hydrate will be heated to remove the water, and the percent can be found by measuring the mass of the solid before and after heating. The hydrate will be indentified by comparing the percent water in the hydrate with the percent water calculated for the possible unknown. Before the lab there are pre-lab questions: 1. Describe the three general safety rules for working with a Bunsen burner.
Glen Mings CHEMISTRY 1 SUMMER 1 Experiment 9 Report Submitted: June 28, 2015 Title: Determination of Water Hardness Using a Titrator Purpose: To find out how “hard” my tap water is; specifically the concentration of calcium carbonate in ppm, and compare it to the four classifications. Procedure: Using a titrator, I measured how much EDTA solution it took to bond all of the Ca2+ ions, which was determined when the EBT turned from purple to blue. And since the reaction is 1:1 stoichiometric, we can assume that the moles of EDTA used equal the moles of calcium ions. Data Collected: | Initial EDTA volume | Final EDTA volume | Total volume of EDTA used | Trial 1 | 7.0 ml | 6.6 ml | 0.4 ml | Trial 2 | 6.6 ml | 6.3 ml | 0.3 ml |
Living things such as humans need water to rehydrate and lubricate their bodies, skin, tissue, joints, and brain. We cannot function without it. 2. a) Use a diagram to show how ions are formed when a sodium atom comes into close contact with a chlorine atom. (2 points) HINT: Think about opposite charges. Use the information from the passage to answer the following questions Supramolecular chemistry involves the study of noncovalent interactions within and between molecules.
How do these two freezing points compare? C. What are some practical applications of freezing point depression, boiling point elevation, and vapor pressure lowering? Questions - Part 2 A. To what biological structure is the dialysis bag comparable? How is it
Justify your response with your observations. 3. Is water a single substance? You need to consider how a substance is defined (include your definition of substance.) 4.
He became an alcoholic, lost his job, his family and in 1995, about seven years later, he committed suicide with a shotgun (Lunsford, 2002, Babinek, 1997). Robert Long shot himself some time after helping rescue nine trapped miners in the Quecreek Mine, PA. (Charney, 2003), There were six suicides after the Oklahoma City bombing. These included Terrance Yeaker, the first police officer to arrive on the scene, another police officer as well as a federal prosecutor who was involved in the McVeigh investigation (Hopkins, & Jones, 2004). The less dramatic incidence of incipient depression is more difficult to document. For example, police have an especially high suicide rate after
So far, 14 people who attended either of the festivals have been confirmed as sick or have having tested positive for E. coli. As for the Pasco County victim, health officials are awaiting her autopsy to see if she was infected with the bacteria or if she died from a kidney disease called Hemolytic Uremic Syndrome (HUS), which can result in children from an E. coli infection. E. coli
Explain why it is important to denature sucrase before measuring product concentration. To insure we are measuring it under the conditions we are testing, not letting it continue to be active after removing it from the water bath. Results Table 1: Effect of pH on Sucrase Activity 1 2 3 average ph 3 0.166 0.167 0.194 0.176 ph 4 0.332 0.331 0.330 0.331 ph 5 0.634 0.676