S2O3-2 (aq) ---> 2I- (aq) + S4O6-2 (aq). This reaction shows that when KIO3 and KI are combined under high acidity‚ I- is oxidized by IO3- and forms I2. Once sodium thisulfate is added to the mixture‚ I2 is reduced to I-‚ once again. Once all of the iodide is used up in the reaction‚ the liquid will changed from brown/yellow to clear. This means that the solution has reached an equivalence point. Since I2 changes the color of the solution‚ it will be used as an indicator in the titration experiment
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Section A (Answer ALL questions in this Section.) 1. Rubidium (Rb) and potassium belong to the same group in the Periodic Table. The relative atomic mass of rubidium is larger than that of potassium. (a) Explain whether rubidium is more reactive than potassium. (b) Write a chemical equation for the reaction between rubidium and water. (State symbols should be given.) (c) Suggest how rubidium can be stored safely in the laboratory. (d) Suggest ONE safety precaution for handling
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Abstract: We tested five common food items to determine which macromolecules were present. We tested for the macromolecules of simple and complex carbohydrates (sugars and starch)‚ lipids‚ and proteins. The foods tested were coconut milk‚ karo syrup‚ potato chips‚ peanut butter‚ and banana baby food. We hypothesized that coconut milk would contain all four types of macromolecules‚ karo syrup would only contain simple sugars which are monosaccharides and/or disaccharides‚ potato chips would contain
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protection against beta radiation. Third is Gamma Radiation‚ it is a highly penetrating electromagnetic radiation with a very short wavelength of less than one-tenth of a nanometer. And it is one of the three types of natural radioactivity; with a sodium iodide detector probe gamma radiation is easily detected with this. Fourth is the X rays or X Radiation‚ it is like the gamma radiation with highly penetrating electromagnetic radiation and they are both forms of a higher frequency ionizing radiation‚ by
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Amanda Ayers 09/07/2013 Title: Observations of Chemical Changes Purpose: To observe some properties of chemical reactions and associate them with everyday household cleaning products. Procedure: In order to complete this experiment‚ I had to set up and organize my lab table. I used my 24-well plate‚ my 96-well plate‚ and the first experiment bag which included all of the necessary chemicals. I also had to gather 3 household cleaning products and a pipet in order to test them as well
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Nomenclature for Ionic Compounds Ionic compounds consist of cations (positive ions) and anions (negative ions). The nomenclature‚ or naming‚ of ionic compounds is based on the names of the component ions. Here are the principal naming conventions for ionic compounds‚ along with examples to show how they are used: Roman NumeralsA Roman numeral in parentheses‚ followed by the name of the element‚ is used for elements that can form more than one positive ion. This is usually seen with metals. You
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solvolysis reaction using ethanol. The concerted bimolecular reaction has no intermediate. The reaction is promoted by the use of a polar aprotic solvent and requires the presence of a strong nucleophile. For this experiment‚ you will use sodium iodide (NaI) in acetone. You will test nine substrates (Figure 1) under each of these two reaction conditions to see which compounds will do SN1‚ SN2‚ neither reaction or both. You will observe the formation of a precipitate upon reaction. For the SN2
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“EXPRESSION‚ PURIFICATION AND QUANTIFICATION OF NEURAMINIDASE GENE OF INFLUENZA” A dissertation submitted to the VIT University in partial fulfillment of the requirement for the award of the degree of MASTER OF SCIENCE In BIOTECHNOLOGY SUBMITTED BY A. SRIKANTH Register No: 08MSBOO1 UNIVERSITY (Estd. u/s 3 of UGC Act 1956) VIT SCHOOL OF BIO SCIENCES AND TECHNOLOGY VIT UNIVERSITY VELLORE-632014 MAY 2010 DECLARATION I here by declare that the project work entitled “EXPRESSION‚PURIFICATION
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Relative Reactivity of Alkyl Halides Introduction Nucleophilic substitution of alkyl halides can proceed by two different mechanisms – the SN2 and the SN1. The purpose of the experiment was to identify the effects that the alkyl group and the halide-leaving group have on the rates of SN1 reactions‚ and the effect that the solvent has on the rates of SN1 and SN2 reactions. The SN1 mechanism is a two-step nucleophilic substitution‚ or unimolecular displacement. In the first step of the mechanism
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Chemistry AP Chapters 4 and 5 Practice Test 1. Which of these compounds is a weak electrolyte? A. HCl B. CH3COOH (acetic acid) C. C6H12O6 (glucose) D. O2 E. NaCl 2. The balanced net ionic equation between aqueous diethyl ammonium chloride and aqueous potassium hydroxide contains which of the following species? A. KCl(s) B. 2 OH-1 C. (CH3CH2)2NH2 (aq) D. H3O+1 E. (CH3CH2)2NH2+1 (aq) 3. In the chemical reaction 5H2O2 + 2MnO4-
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