Ethanol is flammable Sodium hypochlorite is an oxidizing agent and releases toxic fumes (handle in fume hood) Acetic acid is corrosive‚ harmful if inhaled‚ flammable and can cause burns (handle in fume hood) Gloves are recommended to avoid chemical contact with skin Reaction Scheme: Conversion of 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
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Introduction The purpose of this lab was to determine the mole ratios of the reactants hypochlorite ion (OCI ) and thiosulfate (S O ) when reacted in a chemical reaction. A chemical equation gives the mole ratios of the reactants and products involved in the chemical reaction. When some formulas of the products are not known‚ experimental measurements can be made to determine those ratios. During this reaction‚ hypochlorite ions oxidize the thiosulfate ions according to the unbalanced and incomplete reaction
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solution would be 0.00935 M. Enter your calculated molarity of the primary standard KIO3 solution. Please use 3 significant figures. Your Answer: 0.01 You Scored 3 points out of 3 Possible 7) Data Entry - No Scoring Standardization of the sodium thiosulfate solution using the potassium iodate primary standard solution. We must examine each of the three acceptable trials. First‚ let’s consider the analyte volume. You were instructed to pipet two 10.00 mL aliquots of potassium iodate into
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Titration Analysis of a Commercial Bleach A. Purpose ! ! ! To review oxidation-reduction reactions and their stoichiometry. To learn the concept and technique of redox titration. To determine the percent (m/v) of an active ingredient‚ sodium hypochlorite (NaOCl)‚ in a commercial bleaching agent. B. Theoretical Background Whereas acid-base reactions involve the transfer of a proton‚ oxidation-reduction or redox reactions involve the transfer of electrons from one substance to another‚
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products in a chemical equation. However‚ in the instance that the products’ mole ratios are unknown‚ it can be determined through the experiment. This method is called continuous variations. In this lab‚ I determined the mole ratio between Sodium Hypochlorite and Sodium Thiosulfate by using continuous variations of ratios in a given volume. This reaction was exothermic so I measured the heat that was produced from the reaction. Hypothesis: The reaction with the proper mole ratio will reach the highest
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from www.icbse.com INDEX 1. Certificate of Authenticity 2. Acknowledgement 3. Introduction -Need of Water -Purification of Water -Need for a stable purification technique 4. Theory -History of Water purification -Bleaching powder and its preparation -Use of Bleaching powder in Sterilization of water 5. Experiment -Aim -Pre-Requisite Knowledge -Requirements -Procedure 6. Result 7. Bibliography Downloaded from www.icbse.com CERTIFICATE OF AUTHENTICITY This is to certify that
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Hydrochloric Acid‚ 1.0M-1 mL 1 Lead (II) Nitrate‚ 0.2 M- 2 mL in Pipet 1 PhenolphthaleinSolution1%1mL 1 Potassium Iodide‚ 0.1 M-2 mL in Pipet 1 Silver Nitrate‚ 0.1 N – 2 mL in white Dropper Bottle 1 Sodium Bicarbonate‚ 1 M – 2 mL in Pipet 1 Sodium Hydroxide‚ 1 M – 1 mL 1 Sodium Hypochlorite‚ 1% - 2 mL in Pipet 1 Starch Solution‚ 1% Stabilized - 2 mL in Pipet 1. For the following combinations of chemicals and using a different well of the 96-well plate for each combination‚ place 2 pipet
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bleaches‚ sodium hypochlorite (NaOCl) and calcium hypochlorite Ca(ClO)2 are the oxidizing agents. Before titration‚ the mass of the bleach is weighed out for each trial and recorded‚ approximately 0.4-0.6 grams. After the bleach sample is weighed‚ bleach is poured into a beaker with several aliquots of distilled water to completely wash the bleach out. Next‚ 3 M KI is added to the beaker‚ then 3 M H2SO4 is poured into the bleach with 5 drops of
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Analysis of Commercial Bleach Lab I. Purpose In this experiment‚ the amount of sodium hypochlorite in a commercial bleach will be determined by reacting it with sodium 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
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each) Chemical Name Chemical Formula Common Use 1 Sodium hydroxide NaOH Drain cleaner 2 Sodium hydrogen carbonate NaHCO3 Baking soda 3 Aluminum Oxide Al2O3 Sandblasting sand 4 Sodium hypochlorite NaClO Bleach 5 Aluminum sulfate AI2(SO4)3 Used in antiperspirant 6 Ammonium bromide NH4Br Used in photography 7 Ammonium chloride NH4CI Used in photography 8 Ammonium carbonate (NH4)2CO3 Smelling salts 9 Calcium carbonate CaCO3 Limestone/chalk 10 Sodium chloride NaCI Table salt 11 Calcium chloride CacI2
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