Complexometric Determination of Water Hardness 9/12/2013 Abstract: Two sets of acid-base neutralization titrations were conducted for experimental analysis. The first set of titrations was to standardize a solution manufactured in the lab. An approximate solution of Na2EDTA of 0.004 M was titrated against a known solution of 1.000 g CaCO3/L to deter mine to exact molarity of the Na2EDTA. Ca2+ + Na2EDTA → CaEDTA + 2Na+ The second set of titrations was to use the now standardized Na2EDTA
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added to the flask during refluxing. Refluxing is the heating of a flask to boiling and then allowing the vapors to condense and run back into the reaction flask. Refluxing is a good way of keeping a reaction at a constant temperature. After refluxing is complete the reaction is distilled by the method of simple distillation. The simple distillation process is used to help remove and purify a particular substance‚ in this case the 1-bromobutane‚ from other components in the reaction flask. However
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potassium iodate was dried in an oven. After drying the potassium iodate for an hour‚ it was taken out and in three 250 Erlenmeyer flasks about 0.12 grams of potassium iodate was placed in each flask. The KIO3 was dissolved with 75 mL of distilled water. After rinsing the buret for titration with 10 mL aliquots of thiosulfate three times‚ 10 mL of 1M HCl was added into each flask containing the KIO3 solution. When the acid was added into the iodate solution‚ it turned into a dark brown color. When
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Chemistry 12 Formal Report Measuring Reaction Rate using Volume of Gas Produced By John Doe 23th October 2012 Introduction An essential element of chemistry is finding reaction rates. This is because chemists need to know how long a reaction should take. In addition to needing to know the rate of a reaction at any point in time to monitor how the reaction is proceeding. Many factors effect reaction rates‚ two shown above include temperature and concentration. Concentration affects the
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Experiment 1 The Nature and Properties of Solutions INTRODUCTION The experiment aimed to describe the various ways of expressing the concentration of solutions; prepare solutions of definite concentrations from standard substances by dilution and solve problems involving preparation of solutions and their concentrations. BACKGROUND INFORMATION A solution is any homogenous mixture of two or more substances‚ the relative properties of which may vary within certain limits. The two components
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acetanilide to p-bromoacetanilide Procedure: To a 125 mL Erlenmeyer flask containing a mixture of 95% ethanol (6 mL) and acetic acid (5 mL)‚ dissolve acetanilide (7.4 mmol) and sodium bromide (1.8 g). Place the reaction flask in an ice bath (at least 5oC) for 5 minutes (keep this reaction in the hood). Add sodium hypochlorite (8.3 mmol) by addition of household bleach; leave the reaction flask in the ice bath 5 min. After removing the flask from the ice bath and placing a watch glass over the opening
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SYNT m o d u l a r · l a b o r a t o r y · p r o g r a m · i n · publisher: H. A. Neidig c h e m i s t r y 738 organic editor: Joe Jeffers Copper-Catalyzed Oxidation of Benzoin to Benzil prepared by Carl T. Wigal‚ Lebanon Valley College PURPOSE OF THE EXPERIMENT Oxidize benzoin to benzil using ammonium nitrate and copper(II) ion as a catalyst‚ monitoring the reaction by thin-layer chromatography. Characterize the product using melting point measurement and infrared spectroscopy. EXPERIMENTAL
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(250 ml) 2. Prepare the solution by adding approximately l00ml distilled water to the 250 ml volumetric flask‚ pipetting the calculated volume of stock 6 M HC1 solution into the flask‚ and diluting to the mark with distilled water. Apply parafilm to the flask top and invert and shake to assure mixing. Part B - Standardization of HC1 Solution 1. Clean and Dry three 125ml Erlenmeyer flasks. 2. Mass three portions of
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American University of Science & Technology Department of Laboratory Sciences and Technology CHE: 205L: CHEMICAL ANALYSIS LABORATORY Experiment IV Redox Titration Name: Helena Al Jawhary / Partner’s Name: Eyad Aridi Instructor’s Name: Dr Juliana El Khoury Date of experiment: 10/3/2013 Redox Titration Objective: • To learn some technique in volumetric analysis: Redox titration. • To review the stoichiometry of an oxidation-reduction reaction. • To practice the titration
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not more than particular limit. So the main objective of the practical is to examine the light filth analysis of frozen broccoli using Wildman method for aphids and thrips. Materials Wildman trap flask (2000ml.)‚ and Plunger 50 and 100 ml. graduated cylinders Buchner funnel and screen Filtering flask‚ heavy walled Filter pump Ruled filter paper‚ 9cm diameter Stirring rods Wash bottles Sharp probe 250 and 400 ml
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