Solutions Essays

Creating Solutions of Standard Solutions Jonathan Cody Stewart Gabrielle Wylie Chemistry 1251 section 027 15th October, 2016 Introduction: In this lab, you will first begin by preparing a known amount of Cu2+ by diluting copper (II) sulfate pentahydrate. Dilution is a process in which someone adds an additional amount of solvent to a specific amount of the same solvent; this intern creates a weaker solution. During this experiment you will also be introduced to a Spectrophotometer or Spec 20 for

to prepare stock solutions and determine specific gravity and density of sodium chloride of known concentrations. This lab required us to prepare a stock solution and use that stock solution for three dilutions. Each dilution had a different molarity because of the end volume. The first diluted solution had a concentration of 0.3107 M and a density of 1.0081 g/mL. Out of all the dilutions this was the lowest concentrations because it had to most water added to the stock solution. The second diluted

spread from areas of high concentration, to areas of low concentration. Osmosis is the diffusion of water through a membrane, moving molecules from an area of high concentration, to an area of low concentration. The capability of an extracellular solution to move into or out of the cell is known as tonicity. Three terms are used when relating to tonicity; Hypertonic, Hypotonic, and Isotonic (khan, 2016). In hypertonic environments (where there are more solutes outside than inside the cell) cells will

Fluoride. What is it? A nutrient? A medication? A pollutant? Water fluoridation has been a popular matter that has been going on for years. Many cities have been implementing fluoride in public water systems and many have not. The reason behind water fluoridation is that can help tooth decay. But fluoride’s adverse effects prevent some cities from imposing this practice. Water fluoridation should not be implemented within public water systems due to its detrimental effects on health, its catastrophic

beaker halfway with distilled water, making sure all beakers have equal amounts of water. Cut 6 30 cm dialysis bags and label each bag with a letter, A through F. Fill each dialysis bag with 15 mL of solution A through F that corresponds with the lab on each bag. For example, bag A is filled with solution A. Measure the mass of each dialysis bag and record masses of each bag in BILL. Cover the beakers with paper towel and leave the bags in the beakers overnight. Remove the dialysis bags from the beakers

determinations were performed at ambient temperature. Standard Solutions Stock solutions of either VAL or SAC 1000 µg/mL were prepared in HPLC-grade methanol. The solutions were stored in refrigerator at

Counseling - ECPY 630-97-4162_SYLLABUS The Effectiveness of Solution-Focused Therapy with Children in a School Setting 18 April 2017 University of Louisville Reference Franklin, C., Biever, J., Moore, K., Clemons, D., & Scamardo, M. (2001). The effectiveness of solution-focused therapy with children in a school setting. Research on Social Work Practice, 11(4), 411-434. Brief Introduction The study was designed to gauge the impact of solution-focused therapy on students, specifically children

Solution Focused Therapy was first seen to work best with middle-aged adults (Dahl, Bathel, & Carreon, 2000, p. 47). Now that research and its application have been conducted it has been seen to work well with a wide range of populations. Some populations that it works well with are elderly, immigrants, psychiatric hospitals, families coping with suicide, Native Americans, children with social phobias, adolescents with moderate depression, and caregivers of stroke survivors. This list is short compared

Solution-focused brief therapy (SFBT) is future-focused, goal-oriented therapeutic approach to brief therapy developed initially by Steve de Shazaer and Insoo Kim Berg at the Brief Family Therapy Center in Milwaukee in the early 1980s (Corey p. 371). In this type of therapy, therapists engage clients in talking about the problem, but focus on leading them outside of the problem (Clarke p. 430). The clients’ strengths and resiliencies are emphasized during the session by focusing on exceptions to

Developed by Steve de Shazer and Insoo Kim Berg, Solution-Focused Brief Therapy (SFBT), is a behavior based, goal oriented, treatment system that focuses on the present and future, rather than past experiences, to find solutions to problems (Goodtherapy.org, 2016). This paper will explore Solution-Focused Therapy, its core constructions, approach, and techniques. Core constructs Berg and de Shazer (as cited by Fiske, 1998), used three principles to direct their philosophy when creating SFBT: (1.)

how a client would like their life to be, rather than focusing on the past and the origin of problems (Lutz, 2017, What is Solution-Focused Therapy section, para. 7). Mariah does wish to continue her education, as prior to her grandmother’s illness she was not struggling but rather excelling in her academics. Due to the circumstances, Mariah has found that a possible solution to her current stressors would be to obtain her GED while also spending as much time with her grandmother as she can. She has

there has been a progression from longer to shorter forms of treatment. Solution-focused brief therapy (SFBT) supports this progression and abandons the complex model whereby the therapist has a more leadership role (Bannick, 2005). SFBT was developed by Steve de Shazer and Insoo Kim Berg as well as other colleagues in Milwaukee, Wisconsin in the 1980s. Solution-Focused brief therapy focuses on helping clients build solutions rather than solving problems (Iverson, 2002). SFBT emphasizes on fixing

percent of sucrose solution out of the four variables; 0% , 5%, 10%, and 15%. After we filled the beaker we then got two potato cores. Once we had the cores we cut the skin off the ends. Following this we then cut the two potato cores into four 2.00 cm potato cores. After they were cut into 2.00 cm each we found the mass. We zeroed out the scale and weighed all four potato cores at once and recorded the mass. We then put those potato cores into the beaker of 75 mL of solution. With the potato cores

to the investigation into the murder case. Data analysis revealed that Mr. Green had a specific reason for killing her. Further research revealed that Miss Scarlet had been poisoned by Mr. Green using a silver nitrate solution. It was found that Mr. Green’s silver nitrate solution had a molarity of 0.564 M using the balanced chemical equation. The conclusion that Mr. Green committed the murder and used silver nitrate as a murder weapon is supported by this evidence. This case is a reminder of the

Determining Tonicity of Solutions as Compared to Decalcified Eggs   Abstract: Osmosis is the tendency of molecules of a solvent to pass through a semipermeable membrane, from an area of higher concentration to that of a lower concentration. The following experiment was designed to utilize this principle in order to determine the tonicity of a set group of solutions, as they related to eggs. In this experiment, decalcified eggs were placed into four different solutions, with mass measurements of

having a a solution and adding a solvent to it that would be immiscible with the solvent of the original solution. By adding this solvent and mixing it with the preexisting solution, the result will be a solution with two clear layers. The top layer would contained the aqueous solvent, while the bottom layer would contained the organic solvent. The layers are determined by the densities of the liquids, and in this experiments case the organic layer will be in the bottom. If a solution is miscible

find out how the Concentration of a Salt Solution will affect the mass of a Potato Investigation Background Information: In this investigation we are going to see how osmosis occurs in a potato and affects the mass by reducing or adding onto it. Osmosis is the diffusion of water between a semi-permeable membrane from a higher concentration to a lower concentration. Variables that can be explored in this investigation is how the concentration of salt solution could affect the mass as well as how

of SDS solutions at various concentrations are tested for their conductance at two different temperatures, 25 °C and 50 °C. For detailed procedure, refer to the lab manual (J. F. Wójcik and T. S. Ahmadi, Experimental Physical Chemistry, 2015; p.125-129.). Data Sodium dodecyl sulfate has a molecular weight of 288.372 g/mol, with a density of 1.01 g/cm³. The melting point of SDS is in the ranges of 204 -205.5 °C. In this experiment, 8.6151 g of SDS was weighed to make a 500-mL 0.06 M solution. Before

Qualitative Data: It was evident that after the potato cylinders were taken out from the sodium chloride solution after an hour, the ones that gained mass had increased in rigidity, becoming more turgid as well as appearing bigger than before. Their color also changed from distinct yellow to a lighter shade of yellow. On the other hand, potato cylinders that were put in a high concentration solution shrunk in size and they became shorter in length since they lost water. They felt softer, more flexible

fact that it has little to no sodium. This experiment is connecting to the pH scale because if I used water of a pH of 3 then for my next trial I use water of the pH 8 I would not have controlled data and to conclude there will not be any isotonic solution with a base percentage as a final answer. Therefore, we must use the same pH leveled water in order for the amount of salt to stay controlled throughout the whole