EXPERIMENT 8 QUANTITATIVE DETERMINATION IODOMETRIC TITRATION OF COPPER CONCENTRATION IN AQUEOUS SOLUTION B Y RESULTS AND DISCUSSION Considered as moderately weak oxidizing agent‚ Iodine was used for the determination of strong reductants. Standard iodine solutions were found to have smaller electrode potentials as compared with the other oxidants‚ gaining them the advantage of imparting a degree of selectivity essential in the determination of strong reducing agents amid the presence
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Comparison of Effective Biodegradable Plastics from; Saba(Musa paradisiaca) and Taro (Colocasia esculenta) An Investigatory project Submitted to the College of Arts and Sciences in Partial Fulfillment of the Requirements in Plant and Animal Genetics Submitted by: BS Biology 3 Abstract: The purpose of this experiment is to help one of the biggest issues concerning the environment‚ the massive production of plastics. The researchers will use environment-friendly
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1/1/2012 Digestive System Enzymes Digestion of Carbohydrates in relation to Ph. levels 2012 HAUBER-SIX‚ Janina Queensland Government 1/1/2012 The follow experiment was prepared‚ conducted and analysed in order to test at which pH level starch will be digested at fastest. The digestive system is a complex network of organs as well as other structures which all work together to supply the body with the necessary nutrients and energy required. If problem occurs along the digestive tract the
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The Equilibrium Constant of an Ester Hydrolysis Reaction CHM 152LL Section 33263 March 28‚ 2014 John Weide Abstract: The purpose if this experiment is to determine the equilibrium constant of an unknown alcohol. In this experiment unknown alcohol number three and unknown ester number three were used. The equilibrium constant was found by titrating a series of reactions containing H2O‚ HCl‚ and the unknown ester with only the last solution containing the unknown alcohol
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depends on various factors‚ such as temperature‚ pH‚ cofactors‚ activators and inhibitors. Invertase is an enzyme which is usually found in plants. It acts as a catalyst for the hydrolysis of sucrose. Sucrose is a disaccharide composed of glucose and fructose linked by a glycosidic bond. When this bond is cleaved in a hydrolysis reaction‚ an equal amount of glucose and fructose. Invertase is a significant enzyme because glucose is an important product of photosynthesis. Invertase is also used in the
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of carbohydrates begin in the mouth‚ where an enzyme‚ salivary amylase (α-amylase;ptyalin) starts to breaking the polysaccharides (starch) into short polysaccharides (dextrin). Dextrin is a partial degradation of starch‚ shorter chains of maltose units. Salivary amylase is inactivated by stomach acid in the stomach and to a small extent‚ it continues breaking down starch (but there’s no enzymatic activities on carbohydrates in the stomach). An intestinal enzyme‚ pancreatic amylase‚ continues the activity
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of NaHCO3 was combined with two drops of HCl-CO2. The results were observed and recorded. In column 1 of row B; two drops of HCl was combined with two drops of BTB. The results were observed and recorded. In column 1 row C‚ two drops of NH3 was combined with two drops of BTB. The results were observed and recorded. In column 1 row C; two drops of NH3was combined with two drops of BTB. The results were observed and recorded. Next‚ in column 1 row D‚ two drops of HCl was combined with two drops of Blue
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sensitive to heat; more complete protein than casein o During denaturation‚ casein adheres to beta-lactoglobulin o Lactose (4.8% w/v): disaccharide (glucose + galactose) o limited sweetness (unsuitable as a sweetening agent‚can be improved by hydrolysis) o reducing sugar (Maillard rxn upon heating) o limited solubility in water (crystallization in highly concentrated dairy foods: ice cream!‚ whey cheese‚ sweetened condensed milk) o bacteria utilize lactose in fermentations (LAB) o Lactose
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contain Reducing/NonReducing Sugars‚ Lipids‚ Proteins or Starch. Apparatus/Materials: - Bunsen burner - Solutions A‚ B‚ C‚ D‚ E‚ F and G (unknown) - Measuring Syringes - Stirring Rod - Beakers - Test tubes (7)plus holder and tray - Copper sulphate solution (CuSO4) - White dropping ray - tripod stand and mesh -stopwatch - Biuret͛s solution - Sodium Hydroxide solution (NaOH) (or Potassium Hydroxide solution) - Hydrochloric Acid (HCl) - Sodium Hydrogencarbonate (NaHCO3) - Iodine Solution(I2)
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000 years of age less than 1% of the 14C is left in the bone and thus it is not useful for determining the exact age beyond that. 3. Hydrolysis - A chemical reaction where a chemical is broken down by a reaction with water. Hydrolysis is important for the digestion of food‚ making it biologically important. 1. Condensation - The opposite of hydrolysis‚ when two molecules form one. In most biochemical reactions water is produced when the molecules join. Condensation reactions are used to
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