Megan Adkins-Blanch 11/10/14 TA: David Stephens CHE 3652-003 Aldol Condensation: 4-methoxychalcone Abstract: To synthesize 4-methyoxychalcone. Reaction Mechanism: Table: Compound Molecular Weight (g/mol) Density (g/mL) Boiling Point (°C) Melting Point (°C) Amount used (g‚ mL‚ etc.) Acetophenone 120.16 1.03 201.7 19.7 1 ml 95% ethanol 46.07 0.8 79 -114 50% NaOH 40.2 1.53 140 12 Anisaldehyde 136.16 1.12 248 -1 1 ml Structures: Acetophenone: 95% ethanol: 50% NaOH: Anisaldehyde: MSDS:
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DISCUSSION: Qualitative analysis is used to determine the presence of cations or anions present within a sample and their impurities. Information known‚ such as chemical and physical properties‚ about cations and anions can be used to determine what steps should be used to separate the sample into one‚ specific ion. Qualitative analysis involves forming and decomposing complex ions. Qualitative tests are very sensitive‚ allowing to detect a very small amount present in sample. Due to sensitivity
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Buston and Wight in 2010 conducted a qualitative study (in-depth interviews) to better comprehend what motivates incarcerated male young offenders to seek STIs testing and why others have not been tested. The independent variables included characteristics of the interviewees (e.g.‚ age‚ sex education‚ sexual partner history‚ contraceptive use‚ testing for STIs‚ residential care‚ religious background‚ and education level). The dependent variable was STI testing behaviors. The sample included 40
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to minimize anxiety. 2. What is the justification for using a qualitative method? A quantitative study cannot be used because information cannot be obtained objectively and results being tested cannot be measured. The qualitative method is appropriate because the study involves gathering and analyzing information regarding the children’s experiences. 3. What are the philosophical underpinnings of the research method? Qualitative researchers believe that an individual’s experiences
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CH 127 – Chem 2 Lab Determination of an Equilibrium constant Goals The purpose of this experiment is to determine the equilibrium constant for the reaction Fe3+(aq) + HSCN(aq) –>FeSCN2+(aq) + H+(aq). The equilibrium constant expression Kc for Reaction is kc=FeSCN2+[H+]Fe3++[HSCN] Procedure *Preparation of the Beer’s law plot Prepare five solutions of FeSCN2+(aq) of known concentrations between 1x10-5M and 1x10-4M by diluting various volumes of 4.62x10-4 HSCN. Calculate the Final concentration
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PUTTING IT TOGETHER: Classifying Chemical Reactions Purpose: To observe and differentiate between the four different types of chemical reactions. Variables: The independent variables are the sodium chloride‚ sodium carbonate‚ magnesium‚copper‚ copper (11) sulfate‚ silver nitrate‚ oxygen‚ lead(11) nitrate‚ sodium carbonate‚ copper (11) sulfate pentahydrate. The dependent variables are the chemical reactions that are being looked for. For example decomposition‚ synthesis‚ single displacement or double
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Qualitative Interview Volunteerism is a fundamental principle in my personal life as it addresses my desire to help others. This quality has been a part of me since childhood. I have vivid early memories of wanting to help my grade school classmates who would come to school visibly less fortunate than others. These desires followed me through adulthood and lead me to a career in social work. I chose this topic to research because no one in my immediate family volunteered or spoke of volunteerism
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Qualitative and Quantitative Research Tina Okun June 24‚ 2015 Professor Makin Research Methods and Statistics for Criminal Justice Abstract This essay will describe a research subject. The essay will discuss existing literature in regards to the subject. Variables that affect the subject will be explored. The methodology in which the research will be conducted will be revealed. The rationale of the methodology will also be provided. Lastly‚ annotated references will be included
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Introduction A lot has been researched and written on the problems bring about by failure in debt management. Countries such as Greece and Iceland have fallen or on the verge of falling into bankruptcy‚ financial giants such as Lehman Brothers Holdings Inc. and Washington Mutual Inc. were also not spared being wiped out of business due to bankruptcy. Debt is indeed a double edge sword. The concept of leverage in finance taught us that borrowings allow owners the potential to reap many folds of
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Abstract Water “hardness” was analyzed in this experiment‚ through the determination of CaCO3 concentration. This was achieved by the titration of an unknown solution using a standardized 0.1M EDTA‚ and addition of Eriochrome Black T to the unknown‚ to indicate the endpoint of the titration. The average concentration of CaCO3 obtained was 1034 ppm‚ with a standard deviation of 2.4495. The results indicate that the unknown solution can be considered as hard water. Introduction The
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