percent of acetic acid present in commercial vinegar and the weight-to-volume percent of ammonia present in window cleaners. Acid-base titrations can be conducted using the above samples against standardized aqueous NaOH and standardized aqueous HCl solutions respectively. 2. Introduction: Acetic acid‚ commonly known as ethanoic acid CH3COOH‚ is found in commercial vinegar. It is a weak organic acid that gives vinegar its characteristic pungent smell‚ sour taste and slight acidity. Being an acid‚ vinegar
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time of day‚ knife used to cut fruit‚ portion of fruit‚ environment (room temperature‚ humidity etc.) Materials: 2 apples A stopwatch A camera 7 cups 7 plates Paper and pen (for labels) 300mL of vinegar 300mL of orange juice 300mL of lemon juice 300mL of milk 300mL of water 300mL of methylated spirits 300mL of baking soda solution 1 serrated knife Method: 1. Gather all materials and determine the pH of the 7 substances used. 2. Make the
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[pic] |THE MECHANISM FOR THE ACID CATALYSED HYDROLYSIS OF ESTERS | | | |This page looks in detail at the mechanism for the hydrolysis of esters in the presence of a dilute acid | |(such as hydrochloric acid or sulphuric acid) acting as the catalyst. It uses ethyl ethanoate as a typical| |ester.
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1. Aim To determine the percentage of aspirin in different commercial preparations and to find which is the best value for money 2. Hypothesis The greater the percentage of acetylsalicylic acid (ASA) in the tablet‚ more powerful and efficient the aspirin would be due to the way aspirin works in human’s body. Aspirin is often used to alleviate the pain‚ and the sensation of pain is mainly attributed to a chemical substance called prostaglandins‚ which is responsible to send a strong signal
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EXPERIMENT 13： Extraction: Extraction with acid and alkali Objective 1. To recover the benzoic acid and p-dichlorobenzene from its mixture from its mixture by using acid-alkali extraction. 2. To determine the percentage recovery and melting point of the recovered benzoic acid and p-dichlorobenzene. Introduction Acid-base extraction is a process which purifying the acids and bases from mixtures based on their chemical properties. Acid-base extraction is performed to isolate the compounds and natural
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Acid Rain: The Southern Company (A) Problem Statement In 1992‚ executives at the Southern Company have three years to formulate a robust and complex strategy that will involve massive capital outlay and substantial modifications to processes and procedures as it works to comply with provisions enacted in 1990 to the amendments of the Clean Air Act‚ while simultaneously ensuring they remain sustainable and profitable. Analysis The Southern Company is an American based electric utilities
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Jeff is not an active individual and weighs 176 pounds. His RDA for protein would be * 64 3 ) The buildup of excess fluid in extracellular spaces is * Edema 4 ) Proteins can be broken down to supply energy for the body. How may kcal per gram? * 4 kcal 5 ) The R group on some amino acids have a branched chain - Which one of the following is not a branched-chain amino acid? * Peptide 6 ) What is the protein requirements for a 154 pound male? * 70 kilograms 7
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Acid-a chemical substance that neutralizes alkalis‚ dissolves some metals‚ and turns litmus red; typically‚ a corrosive or sour-tasting liquid of this kind. How does acid clean copper- “The oxygen in the air and the copper in the pennies form an oxide that coats the pennies and makes them look dirty. The acids break the copper oxide free from the penny. As we have seen experimentally‚ acid alone does not clean as well as acid and salt.” Can acid kill you?-”The actual causes of death however are not
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Determination of the ASA Content of Aspirin Due Date: September 16‚ 2013 Experiment#: 2b Title: Determination of the ASA Content of Aspirin Aim: To determine the Molar Concentration of NaOH and HCl acid used in their Standardization processes and to determine the acetylsalicylic acid (ASA) content in Aspirin. Materials/Apparatus: materials used are the same as that outlined in the laboratory procedure prepared by the laboratory instructor. Procedure: The procedure used is the same as that outlined
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Analysis of acid by titration with sodium hydroxide Ms. Hoang November 2012 Introduction: The purpose of this experiment is to demonstrate an example of how to determine the unknown molarity of hydrochloric acid by titration with a base (sodium hydroxide). Titration is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte (wekipedia). The first step will be measuring and combining water and acid (Hydrochloric
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