Chemistry Unit 2 Area of Study: 1: Water Chapter 11: Measuring solubility Measuring Solubility Solubility: the maximum amount of that substance that can be dissolved in a that temperature Saturated solution: a solution which no more solute can be dissolved at that temperature Measuring solubility Determine the maximum mass of solute that can be dissolved in 100 grams of solvent at a particular temperature Worked Example A maximum of a 6g of solute can be dissolved in 20g of water at 20ºC
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Industrial Hygiene Hexavalent Chromium www.saif.com INDUSTRIAL HYGIENE Hexavalent Chromium Introduction Hexavalent chromium‚ Cr(VI)‚ has many uses in industrial processes. Some major industrial sources of hexavalent chromium are: Chromate pigments in dyes‚ paints‚ inks‚ and plastics. Chromates added as anti-corrosive agents to paints‚ primers and other surface coatings. Chrome plating by depositing chromium metal onto an item’s surface using a solution of chromic acid. Particles released
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Abstract The experiment‚ entitled Extraction and Characterization of Proteins‚ aims to isolate casein from milk and albumin from egg; to explain the methods employed for protein extraction; to apply spectrophotometric methods in characterizing and quantifying extracted casein and albumin. The experiment was divided into 2 parts; the extraction of Albumin from egg and the determination of protein concentration via the Warburg-Christian method and Bradford Assay method. In the first part‚ egg
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work to city office jobs. During both World War I and World War II‚ women were called on‚ by necessity‚ to do work and to take on roles that were outside their traditional gender expectations.[1] In Great Britain this was known as a process of "Dilution" and was strongly contested by the trade unions‚ particularly in the engineering and ship building industries.[1] Women did‚ for the duration of both World Wars‚ take on jobs that were traditionally regarded as skilled "men’s work".[1] However‚ in
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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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B C D E Sample Dilution Factor Measured Abs280 Undiluted Abs 280 (B x C) Graph Bar HEW 80 0.918 73.44 LOAD 10 0.881 8.81 1 Phos 1 4 0.767 3.068 2 Phos 2 1 0.527 0.527 3 Phos 3 1 0.248 0.248 4 Phos 4 1 0.050 0.05 5 Carb 1 4 0.646 2.584 6 Carb 2 1 0.490 0.490 7 Carb 3 1 0.127 0.127 8 Graph: Abs 280 (Undiluted) Table 2: Biuret Raw Data A F G H I J Sample Dilution before adding Biuret reagent Additional dilution factor (Biuret reagent) Total dilution factor into cuvetter
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Olaso ______________________________________________________________________________ INTRODUCTION Generally‚ there are two ways in preparing a solution‚ one is by dissolving a weighed amount of solid in a required solvent and the other is by dilution of a concentrated solution into the desired concentration. In diluting concentrated solution‚ the concentration of the diluted solution can be determined by standardization. To standardize a solution‚ we will need to perform titration. In this
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Recognizing the Danger of Household Chemicals Using Brine Shrimp Katie Morton per. 2 11/19/14 Purpose: ● ● ● ● ● ● ● ● Recognize the possible dangers of household pollutants. Use the scientific method to design an experiment to test chemical pollutants. Measure the effect of various toxic materials on brine shrimp. Measure using scientific units. Operate scientific equipment. Practice basic laboratory safety. Conduct a scientific investigation as a team. Learn about the basic biology of brine shrimp
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Antonie van Leeuwenhoek63: 343-352‚1993. © 1993KluwerAcademicPublishers. Printedin the Netherlands. Kinetics of growth and sugar consumption in yeasts J ohannes R van Dijken‚ Ruud A. Weusthuis & Jack T. Pronk D epartment of Microbiology and Enzymology‚ Kluyver Laboratory of Biotechnology‚ Julianalaan 67‚ 2628 BC Delft‚ The Netherlands K ey words: a lcoholic fermentation‚ chemostat culture‚ Crabtree effect‚ respiration‚ Saccharornyces cerevisiae‚ y easts A bstract A n overview is presented
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transferred onto PVDF membrane (0.45mm; Millipore USA). After blocking for nonspecific binding using 3% BSA‚ the membrane was incubated with rabbit anti-SRL polyclonal antibodies at 1:5‚000 dilutions followed by treatment with a secondary antibody‚ horse radish peroxidase (HP) conjugated anti-rabbit IgG at 1:2‚000 dilutions (Biorad USA). Bound secondary antibodies were detected by Immuno-StarTm HP reagent (Biorad USA) and the blots were exposed to X-ray film followed by
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