objective of this experiment was to determine the amount of sulphate by a process called gravimetric analysis. Gravimetric analysis is the quantitative isolation of a substance by precipitation and the weighing of the precipitate. In this experiment‚ sodium sulphate was allowed to react with barium sulphate to form a white precipitate of barium sulphate. This precipitate was then washed‚ filtered and dried‚ to ensure that there are no impurities and water molecules present‚ before it was being weighed
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Assessment task 3 oral presentation summary Description of the experiment * Aim: To observe the reactions of sulfuric acid as an oxidising agent and as a dehydrating agent. Equipment: * 20mL of concentrated sulfuric acid * 20mL of 2mol/L sulfuric acid * 2 small pieces of each of copper‚ zinc and iron * Sandpaper * 10 test tubes * Test tube rack * 2g of sugar crystals (sucrose) * 2 wooden ice-cream sticks * 10mL measuring cylinders Steps: A: Sulfuric acid
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Determination of Sulfate by Gravimetry Jose Luis E. De Guzman University of Santo Tomas‚ Sampaloc‚ Manila The determination of the percentage of sulfate in a sample is done as an instrument of learning a quantitative method of analysis‚ i.e.‚ of the gravimetric analysis. This type of analysis‚ which makes use of the weight of the samples was used for the experiment and required the precipitation of our analyte‚ SO4-2‚ and its filtration as a BaSO4 precipitate so as for weighing it. The weight
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stripping out so much sebum as to make hair unmanageable. COMPOSITION: Shampoo is generally made by combining a surfactant‚ most often sodium lauryl sulfate and/or sodium laureth sulfate with a co-surfactant‚ most often cocamidopropyl betaine in water to form a thick‚ viscous liquid. Other essential ingredients include salt (sodium chloride)‚ which is used to adjust the viscosity‚ a preservative and fragrance. Other ingredients are generally included in shampoo formulations to maximize
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Ammonium sulfate foreign producers 1. Highlights One of the largest producers of specialty chemicals‚ fertilizers‚ plastics and packaging in Latin America. Major producer of styrene and polystyrene. Latin America’s sole producer of acrylonitrile (AN)‚ methyl methacrylate (MMA)‚ acrylic and polycarbonate resins‚ polycarbonate films and cyanides. Largest producer of cast acrylic sheets in the Americas. Latin American’s largest ammonium sulfate producer http://www.unigel.com.br/
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Determination of Sulfate Eisman E. Morales TA: Jackeline Pennywiit Chemistry 121 02/14/2011 Purpose: To determine the percent sulfate in a sample using a semimicro scale gravimetric procedure. Procedure: Refer to pages 41-42 of General Chemistry volume 1 Laboratory Experiments by Judith Casey and Robert Tatz‚ Hayden McNeil Publishing‚ 2010 Report Sheet See attached report sheet. Report Questions 1. Explain how your calculated value for percent sulfate would be affected
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Na+ H+ Wallert and Provost Lab Excel with hard work and inquiry Ammonium Sulfate PPT Protocol Theory and Introduction: Ammonium Sulfate Precipitation is a classic first step to fractionate proteins by causing perturbations in the solvent with respect to ionic strength. Historically‚ separation methods were limited and as a result precipitation methods were highly used with very fine cuts in ppt conditions. As more choices of inexpensive and quality resins are commercially available precipitation
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of the experiment is to synthesize the butly benzoate by nucleophilic substitution and characterize it by IR spectroscopy. The percent yield of the final product is determined after the synthesis. Procedures: 2.0 mL of 1-bromobutane‚ 3.0 g of sodium benzoate‚ 5.0 mL of water‚ 4 drops of Aliquat 336‚ and a boiling stone were placed in a 50mL round-bottomed flask. The reaction mixture was refluxed for 1 hour and the flask was cooled in a beaker in the water of room temperature. The solid was
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focus on is surfactants. The major types of surfactants are anionic‚ cationic‚ nonionic‚ and amphoteric. Surfactants with a positive charge are called cations‚ and ones with a negative charge are called cations. An example of this would be sodium chloride. Sodium forms positive ions upon dissolving in water‚ while chlorine makes negative ions. They attract to each other. Surfactants tie in with shampoo and all other hygiene products‚ because anionic surfactants are the most widely used detergents in
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1. In general‚ solubility rules can be used to predict the outcome of double replacement reactions. I have come to this decision‚ because almost all of the data recorded from the lab‚ with the exception of number 13‚ agreed with the predictions made beforehand. 2. Out of the 15 combinations‚ the observations made for the combination of number 13 (the reaction of lead (II) nitrate and barium chloride)‚ did not agree with what was predicted‚ based on the solubility rules. The solubility rules
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