isotonic. 2- What was the role of the indicators (Lugol’s and Benedict’s solutions) used in the cell model experiment? Explain your answer using results you obtained from the cell model experiment. Lugol’s solution is a solution of elemental iodine and potassium iodide in water‚ and it’s been used in this experiment as a reagent for starch detection. Benedict’s reagent has been used as a test for the presence of reducing sugar‚ which include lactose and maltose. 3- Explain the medical
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Autumn Hamman A&P II Unit 4 Disorders affecting the immune system Graves Disease When you think about diseases and disorders that can attack the immune system one of the first ones that might pop into your mind is Graves’ disease. You may not know what it is or how it effects the immune system but you have heard about it‚ after reading this paper you will have a better understanding of the disease and how it affects your body and your everyday life along with how to manage the disease.
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Certificate Certified to be the bonafide work done by Miss ____________ of class _____XII B____ in the________CHEMISTRY LAB____________ during the year 2013-2014 Date____________________________________ P.G.T. in CHEMISTRY LAB HOLY CROSS HIGHER SECONDARY SCHOOL‚ Pension bada‚ Raipur- 492001 Examination held in CHEMISTRY LAB at HOLY CROSS HIGHER SECONDARY SCHOOL‚ Pension bada‚ Raipur- 492001 Date __________________ Acknowledgement I
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PLANNING Investigating the Kinetics of the reaction between Iodide ions and Peroxodisulphate (VI) ions By the use of an Iodine clock reaction I hope to obtain the length of time taken for Iodine ions (in potassium iodide) to react fully with Peroxodisulphate ions (in potassium Peroxodisulphate). I will do three sets of experiments changing first the concentration of iodide ions‚ then the concentration of Peroxodisulphate ions and finally the temperature of the solution in which the reaction
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NAME; BOAKYE SAMUEL ANSAH COURSE; BSC.CHEMISTRY YEAR; ONE INDEX NUMBER; 1026613
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VITAMIN C Section: Pre-Laboratory Answer the following questions before coming to the laboratory. Give the reason for the following; Iodimetric titrations are usually performed in neutral or mildly alkaline (pH 8) to weakly acid solution. 2. Iodine solutions are prepared by dissolving I2 in a concentrated solution of potassium iodide. 3. Iodimetric determination of vitamin C is performed rapidly after preparing vitamin C solution 9-1 E XPERIMENT 9 IODIMETRIC TITRATION OF VITAMINE
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Fats and oils - 344 Iodine value of an edible oil INTRODUCTION Fats and oils known as triglycerides contain long chain hydrocarbons with carboxyl groups (COOH groups). These fatty acids are classified into the number of double bonds present in the fatty acid. When the carbon atoms in these chains are bounded to the maximum possible number of hydrogen atoms‚ the triglyceride is said to be saturated. When one or more double bonds exist between carbon atoms in the chain‚ less hydrogen exists
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reaction may also be known as the ‘Iodine Clock Reaction.’ The rate of the reaction will be measured by timing the reaction between Hydrogen Peroxide‚ Potassium iodide‚ and Sodium Thiosulphate. Sodium Thiosulphate is used as a delaying mechanism as the reaction between the two main reactants is too rapid to measure. The Sodium Thiosulphate will react with the Iodine [III] ions (the product) first and when the all the Sodium Thiosulphate has reacted‚ then the remaining Iodine ions will form a blue-black
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oxidizing solution using the iodine/ thiosulphate titration where the reducing solution is potassium iodate solution and the oxidizing solution is sodium thiosulphate solution. Potassium iodate solution which is an oxidizing agent is added into an excess solution of acidified potassium iodide. This reaction will release iodine. Potassium iodide is acidified with sulphuric acid and the iodine released quickly titrated with sodium thiosulphate until it become light yellow. The iodine then detected with starch
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mass of ascorbic acid in the tablet. As iodine is a weak oxidizing agent used mainly for the determination of strong reducing agents‚ ascorbic acid C6H8O6 (aq) can be rapidly and quantitatively oxidized by iodine in acidic condition as shown in the following equation: I2(aq) + C6H8O6 (aq) → C6H6O6 (aq) + 2H+ (aq) + 2I- (aq) This method involves the direct titration of the ascorbic acid with a standard iodine solution in an acidic medium. However‚ iodine is not very soluble in water (0.001M)‚ this
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