Final Year Project Progress Report Title: Fat Content Analysis and Characterization of Food Class and Group No. : AS114103/2A1 Student Names : Chan Hoi Ching (120586347) : Chan Wai Yi (120464356) : Cheung Kit Cheung(120552694) : Lam Chi Ching (120224281) : Lam Pik Shan (120181829)
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different analyte concentrations. For the purposes of this experiment‚ indirect potentiometric titration was performed. Std 1 2 3 Weight 0.2158 0.2058 0.202 Final 42.1 42.4 20.3 Initial 20.3 20.9 0 Vol 21.8 21.5 20.3 NaOH M 0.048473 0.046871 0.048726 Ave M 0.048023234 Table 1. Standardization data Titrant used was sodium hydroxide which was standardized using 99.8 %
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lab is to determine the concentration of HCl when titrated with a standardized NaOH solution‚ through means of the titration method. My hypothesis is When an unknown concentration of HCl is titrated with a known volume of standardized NaOH solution‚ one can gather enough data to determine the concentration of the unknown (HCl). My prediction is If an unknown concentration of HCl is titrated with a known volume of NaOH‚ then one can gather enough data to determine the concentration of the unknown
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THE EXPERIMENT There are four parts to this experiment‚ two of which involve preparation with the remaining to involving standardization. The first part was the preparation of 250ml of 1.0 M sodium hydroxide (NaOH) solution from a solid. Using a top-loading balance‚ ____ g of NaOH was transferred to a clean Erlenmeyer flask. Distilled water was then added until the solid was completely dissolved. The solution was transferred to a 250ml volumetric flask and mixed. Once mixed‚ the solution was
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GENERAL CHEMISTRY Laboratory Guide This module provides a laboratory guidelines‚ safety declaration form‚ Lab Report guidelines and Laboratory manual for subject of General Chemistry (CLD 10004). Mohd Zulkhairi Abdul Rahim Laboratory Information Before each lab session‚ you should prepare by reading the lab manual and the textbook required reading. We expect you to have a good understanding of the purpose‚ details of the procedure‚ the use of all chemicals and any significant hazards
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water‚ if necessary‚ to restore the liquid level to its preheating height. Before you can start the titration you must standardize the NaOH solution. Rinse a buret once with distilled water and three times with small amounts of the solution of NaOH.. Standardize the sodium hydroxide solution by titrating it against accurately weighed 0.06 g samples of KHP. Rinse a 10-mL pipet once with distilled water and three times with small amounts of the decarbonated cola drink. Use the pipet twice
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ensure maximum purity‚ and filtered‚ dried‚ and weighed. The melting point of the product was determined using a Fischer-Johns melting point apparatus. The acid then dissolved in separate beakers with 95% ethanol and water and titrated with 0.050 M NaOH‚ previously standardized with potassium hydrogen phthalate‚ through potentiometric titration. The pH after addition of base was measured and plotted against the volume of titrant added using three different plots. Results show a 61.0% yield and the
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Discussion The acid neutralising capacity (ANC) of 3 brands of calcium carbonate (CaCO3) tablets was determined by reacting the tablets in excess standardized hydrochloric acid (HCl) and then back-titrating with a standardized sodium hydroxide (NaOH) solution. Back titration was required for two reasons. Firstly‚ CaCO3 tablets are poorly water-soluble but dissolve rapidly in acid. Secondly‚ CaCO3 is a weak base so it is difficult to determine the end point of the reaction if titrated directly. Assuming
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At the pre-equivalence point‚ the titrant is now added. For this experiment‚ NaOH‚ a strong base‚ was added to KHP‚ a weak acid. With the addition of a strong base to a weak acid‚ a phenomenon similar to that of buffers occurs‚ and the solution initially resists drastic pH changes as backed up by the results of the experiment. At the post-equivalence point‚ since the solution was already neutralized and excess NaOH is still added‚ the solution’s pH further increases. 2. Why is continuous stirring
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the Philippines‚ Diliman I. Synthesis of Salicylic Acid Purpose: Part I of the experiment illustrates the base hydrolysis of an ester‚ methyl salicylate‚ to form salicylic acid through nucleophilic acyl substitution. Procedure: Dissolve 12 g NaOH in 70 mL water in a 150 mL round bottom flask. Add 5.0 mL methyl salicylate and reflux the reaction mixture at its boiling point for 15 minutes using a stirrer hotplate and stirring bar. Cool the mixture to room temperature. Carefully add 3 M H2SO4
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