PREPARATION OF ASPIRIN AND DETERMINATION OF THE MELTING POINT Ferrer‚ Lara Melissa V. Faculty of Engineering University of Santo Tomas Manila‚ Philippines ABSTRACT This experiment involved three steps: synthesis of aspirin‚ isolation and purification‚ and the estimation of purity of the final product. The synthesis involved the reaction of salicylic acid and acetic anhydride in the presence of a catalyst‚ phosphoric acid‚ H3PO4. When the aspirin was prepared‚ it was isolated and filtered. The percentage
Premium Aspirin Acetic acid Acetic anhydride
Experiment #5: Acid Burn!!! Introduction The goal of this lab was to correctly prepare a 0.2M solution of NaOH‚ identify highly acidic household cleaning chemicals‚ and determine their concentration (molarity) through titrations using the previously prepared 0.2M NaOH solution. Experimental First‚ to create 0.5L of 0.2M solution of NaOH‚ standard 3M NaOH solution was obtained. Next‚ calculations were performed to determine the amount 3M NaOH necessary to create 0.5L of the 0.2M solution and‚ as
Premium Chemistry Sodium hydroxide Base
8. three main types of hospitality operation: Johnston has proposed the concept of three main types of hospitality (industry) operations based on the hospitality exchange process: product processing operations‚ customer processing operations and information processing operations. Most activities are a combination of all three‚ albeit in different proportions. An accommodation operation is for example predominantly a customer processing operation‚ with very little product and information processing
Premium Hotel Hospitality industry
Exam preparation: ESC2 Intercultural management The exam questions will be based on all the information covered in lectures since the beginning of this class on October 3rd. You will particularly need to demonstrate precise knowledge of the cultural dimensions and theories studied in class including precise definitions and meanings of: i. The Hofstede and Trompenaars dimensions ii. Proxemics iii. Chronemics iv. Highand low context cultures There will be 3 sections Section 1. 15 multiple
Premium Cross-cultural communication
Preparation and SN1 Reactivity of 2-Bromobutane Paul DeJong Department of Chemistry‚ Illinois State University‚ Normal‚ IL 61790-4160 Submitted: April 4‚ 2013 Introduction The purpose of part 1 of the lab is to prepare 2-Bromobutane using SN1 reactions. The purpose of part 2 of the lab is to determine the relative reactivity of alkyl halides under SN1 conditions. Results and Discussion The Overall Reaction The Proposed Mechanism Experimental Procedure To prepare
Premium Chemistry Stoichiometry Chemical reaction
Basic Interview Preparation & Dress Code Authors: Ruth Mayhew‚ Demand Media Link: http://work.chron.com/basic-interview-preparation-dress-code-8947.html A personal interview is the reward for a successfully presented cover letter and resume. Recruiters and hiring managers generally don’t interview every person who applies for a job. Therefore‚ the fact that you’ve been selected to meet face-to-face with a prospective employer is proof that you appear to have the qualifications
Premium Interview Semi-structured interview Documentary film techniques
you need to strictly adhere to your surgeon’s advice. How long you will need to fast or restrict the use of medicines and supplements will vary depending on your age‚ the type of your operation‚ and your personal health history. PREOPERATIVE PREPARATIONS Why Fasting is Necessary The most effective and efficient way to ensure that you are relaxed during your operation‚ and that you will not feel any discomfort or pain‚ is with the use of a sedative or an anesthesia‚ whether general or local. Preoperative
Premium Obesity Nutrition Hypertension
nitrogens on this station. Both of these methods rely on the repulsive electrostatic interactions between the positively charged axial component and the post-switching cationic nature of the benzidine station (Figure 5.4). Deuterated trifluoroacetic acid (d-TFA) was added in the solution which resulted in the protonation of the benzidine residue and shuttling of macrocycle in to the biphenol station of the Rotaxane. This was supported by NOESY 1H NMR that showed a shift in the peaks in retrospect to
Premium Nutrition Food
Preparation Guide Numerical Analysis This preparation guide helps you to prepare for numerical aptitude assessments. It provides guidance on how best to approach the assessment‚ allowing you to give your best possible performance. Why are Aptitude Assessments used? Employers often use aptitude assessments as part of their assessment procedures for the selection and development of staff. Research has shown that they are powerful predictors of performance at work. Assessments help you to:
Free Question Answer Assessment
Experiment #1 Preparation of Ethanol from Sucrose Based on R. Weglein & C.L> Yau‚ CHEM 203 Experiments in Organic Chemistry II Laboratory‚ 5th Edition‚ 2006‚ p29-32. Statement of Purpose: An aqueous solution of ethanol is prepared by the fermentation of sucrose. The percent alcohol is the resulting solution and the percent conversions of the sucrose are to be determined. Introduction: Sucrose is a molecule containing glucose and fructose. http://faculty.tcc.fl.edu/scma/phelpsj/experiments/ethanol
Premium Chemistry Carbon dioxide