2. An aqueous solution of KCl is colorless‚ KMnO4 is purple‚ and K2Cr2O7 is orange. What color would you expect of an aqueous solution of Na2Cr2O7? Explain. Orange. 3. Explain why hexane will dissolve benzene but will not dissolve sodium chloride. Sodium chloride is an ionic compound. 4. Some drinks like tea are consumed hot or cold‚ whereas others like Coca-Cola are consumed only cold. Why? For taste reasons‚ these drinks can be drunk if the user likes It but having coca cola like tea
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Analysis of Soda Ash and Volumetric Analysis of a Carbonate-Bicarbonate Mixture Buti‚ Mary Daphne A. Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila Abstract Sodium carbonate (Na2CO3)‚ commonly known by trade name soda ash‚ is a white‚ anhydrous‚ powdered or granular material that is an essential raw material used in the manufacturing of glass‚ detergents‚ chemicals‚ and other industrial products. In this experiment‚ the percent alkalinity
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Prior to begin the experiment‚ preparation for some solutions is required to enhance the lab performance. The solutions needed are standardized potassium bromate‚ standardized sodium thiosulfate‚ and starch indicator. First‚ to prepare a starch indicator‚ pulverize 1g of soluble starch and add 15mL of water to make it as a paste-like substance. Dilute it with about 500mL of boiling water‚ and continue to heat until the mixture becomes clear. Cool it to room temperature and save it into a stoppered
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Testimony Criminal Investigation and Forensics 1st period Good Moring‚ I am expert witness VaShanti Lawrence. I was called to testify about hair. Also I am here to inform you about the forensic hair analysis and explain why it is considered calls evidence. I am going to prove that the suspect Colin Ross’s hair does match the hair found at the crime scene. This is a diagram of the basic structure of hair a hair from the crime scene‚ or one found on the victim‚ will be microscopically compared with
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Lab 4. Volumetric Determination of Impure Sodium Carbonate (Na2CO3) Introduction: To determine the total amount of carbonate in unrefined sodium carbonate‚ soda ash‚ a titration is done using a standardized solution of HCl. Aqueous HCl is a strong acid and therefore almost completely disassociates into H+ and CL-. Therefore‚ when HCl is used in a titration‚ the H+ is the titrant. Carbonate in aqueous solution is able to accept a proton‚ i.e. it acts as a base. When carbonate accepts the H+ a bicarbonate
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Assignment #1 Evidence: CRJS355 Real/ Physical Evidence Real or physical evidence is evidence that can be addressed to the court directly without any interposing of a testimony of witness other than what is required of the basis for such evidence. Real evidence and physical evidence is basically the same thing physical evidence is just object that has been involved in the actual crime scene or took place and played some type of part in it. But when it comes to real evidence it basically
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Development of Skills Within the group‚ a large amount of skills were used. The majority of the group used listening skills‚ closed and open questioning skills. Opportunities were available where Probing and reflecting could have been put to practise. Other members of the group displayed passive aggressive behaviours ‚ dictated‚ used aggressive and bullying body / verbal language and actions. In my opinion the members of the group displaying these undesirable traits were not aware they were doing
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Evidence-Based Practice Matrix of Ten Pieces of Primary Research on One Topic Related to Nursing Authors Dihle‚A.‚Bjolseth‚G.‚Hels eth‚S. WattWatson‚ J.‚Stevens‚B.‚ Garfinkel ‚P.‚Streiner‚D.‚ Gallop‚ R. Bostrom‚B.‚ Sandh‚M.‚ Lundberg‚D.‚ Fridlund‚ B. Chung‚J.‚ Lui‚J. Resource/Database Journal of Clinical Nursing Academic Search Complete Journal of Advanced Nursing Academic Search Complete Journal of Advanced Nursing Academic Search Complete Nursing and Health Sciences Academic Search Complete
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antibiotics and also get medical care. The CDC provides guidelines and tools for the healthcare population to help prevent C-Diff infections as well as providing resources to help the public protect their own health. Clostridium difficile is shed in feces. Any surface‚ device‚ or material that comes contaminated with feces may serve as a reservoir for the
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In Michael Pollan’s essay‚ “Playing God in the Garden”‚ we are introduced to the New Leaf Superior‚ a genetically engineered potato. This is not the first of its kind‚ for it is only one of the many foods that are products of an emergent development here in the United States. Monsanto and other giant transnational companies are carrying out a dangerous global experiment by introducing large numbers of genetically engineered foods into our diet. Genetic manipulations can result in unanticipated harmful
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