defined variables and to formulate facts and uncover patterns in research (Wyse S.‚ 2011). Quantitative research is made using scientific methods such as experimental control‚ collection of empirical data‚ analysis of data and practicals such as titrations. Qualitative methods‚ on the other hand‚ are the examination‚ analysis and interpretation of observations for the purpose of discovering underlying meanings and patterns of relationships in a manner that does not involve mathematical models (Wikipedia
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Determination of acetic acid in vinegar using acid-base titration 1. Scope The goal of this analytical procedure is to determine the acetic acid content of two samples of vinegar produced by Kolinska‚ Ljubljana‚ Slovenia. These samples are: Sample No. 1: vinegar made from wine‚ 4% Sample No. 2: vinegar made from alcohol‚ 9% The smallest quantity of the sample is 100 mL. Interesting results may be obtained by comparing the acidity of both samples of vinegar with factory analysis data. 2. Principle
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266 Dominick Armstrong 10/10/2012 Acid-Base Titration Introduction Acid and bases are two important classes of compounds that react to form a salt and water. When mixing acids and bases a precise amount of the base must be added in order to reach the equivalence point. At this point‚ one reactant has been exactly consumed by the addition of the other reactant. When performing chemical reactions chemist use a process called titration to determine the equivalence point of the reaction
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Objective: To determine relative molecular mass of a soluble base‚ X2 CO3 by carrying out an acid-base titration with the following reaction ‚ knowing the amount of hydrochloric acid used and the amount of substance Z used. Hypothesis: The X in substance Z is a group 1 element because substance Z is a soluble metal carbonate and would most likely be sodium or potassium because these elements are commonly used. Materials 100 cm3 beaker‚ 250 cm3 beaker‚ 250 cm3 volumetric flask with stopper
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The chemical reaction is shown as: (reaction 1) A simple acid-base titration can be used to determine the concentration of the borate ion base. By dissolving Borax into distilled (DI) water at two different temperatures‚ the amount of borate that went into the solution at each temperature can be measured. The balanced equation: (reaction 2) represents the titration of the borax where the endpoint of the reaction is signaled by the change of bromocresol purple
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these drinks titration method will be used. According to Toledo (2010)‚ titration is an analytical technique which allows the quantitative determination of a specific substance called. Titration is based on a complete chemical reaction between the analyte and the titrant which is added to the sample. The titrant is continuously added to the analyte until the reaction is complete and for easy determination of the end‚ color indicators are used. There are different types of titration. These are‚ acid
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thiosulfate in the presence of iodide ions and starch. A solution of sodium thiosulfate of known concentration will be added to the bleach using a buret in a titration procedure. The disappearance of the dark blue color of the starch-iodine complex will signal the end point. II. Procedures Pre-Lab Questions 1. What is meant by a “titration”? Titration is a technique where a solution of known (acid or base) concentration is used to determine the concentration of an unknown (acid or base) solution.
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II. Potentiometric Determination of the Purity and Acid Dissociation Constant of Salicylic Acid Purpose: Part II of the experiment utilizes the concept of potentiometric titration in the determination of the pKa‚ a measure of the relative acidity of an acid‚ of the salicylic acid product in Part I. Potentiometric titration will also be used to determine the purity of salicylic acid. Procedure: Prepare the following solutions: 250 mL of 0.50 M stock NaOH solution and 250 mL of 0.050 M standard
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sample Background- Per the FDA regulation which states that consumer vinegar may contain no less than four percent and no more than five percent Acetic Acid‚ we will determine the Acetic Acid content of a sample of the vinegar in question through titration. After standardization of our titrant‚ which in this case will be NaOH‚ we will use this along with the indicator Phenolphthalein‚ to titrate the vinegar to determine the concentration of Acetic Acid in the sample. Equipment and reagents- We
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11/10/2014 experiment 1 Analysis of Commercial Vitamin C Tablets Objective To employ titration technique to determine the content of vitamin C in commercial tablets using volumetric analysis and compare it with the manufacturers’ specifications. Introduction Deficiency of essential antioxidant Vitamin C in human will lead to scurvy. In this experiment‚ the vitamin C content of commercial tablets is determined and then compared with the manufacturers’ specifications. Vitamin C‚ ascorbic
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