Hot Plate 10ml of 0.1M HCl 10ml of 0.01 M HCl 10ml of 0.001 M HCl 10ml of 0.001 M NaCl 10ml 0f 0.01 M NaCl 10ml of 0.1 M NaCl 10ml of tap water 9 Test Tubes (The Effect of pH) Graduated Cylinder 6 Discs of Frozen Beetroots (3 per experiment) 10 ml of Acetone per experiment Procedure: The Effect of pH 1. Top and bottom of beetroot were cut off by scalpel. The cork borer was used to cut out about 3-4 cores‚ then each core was cut into uniform discs about 2mm thick. 2. Discs were
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Instructor: Professor Jennifer Frere Date: 03.08.2015 Predictions Sucrase will have the greatest activity at pH 6 Sucrase will have the greatest activity at 60 °C (140 °F) Sucrase activity decreases with increasing sucrose concentration Materials and Methods Effect of pH on Enzyme Activity Dependent Variable amount of product (glucose and fructose) produced Independent Variable pH Controlled Variables temperature‚ amount of substrate (sucrose) present‚ sucrase + sucrose incubation time Effect
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prepare 100.0 mL of NaOH(aq) that has a pH = 13.62? 2. What is the [OH-] in 0.025 M HCl ? 3. What is the pH of 0.50 M Sr(OH)2 ? 4. The pH of an aqueous solution is 10.32. The [OH-] is …………………… 5. The [H+] in 0.050 M Mg(OH)2 at 25oC is ………………………. 6. The pH of 0.20 M HNO3 is ……………………. 7. A solution is prepared by adding 200. mL of 0.125 M of HCl to a 500.0mL volumetric flask and filling it to the mark with water. The pH of this solution is ………. 8. Consider
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Lewis acid. At room temperature‚ it exists as white powder or colourless crystals with a chemical formula of H3BO3 or B(OH)3. Apparatus and materials: •Sodium tetraborate •Concentrated hydrochloric acid •Concentrated sulphuric acid •Methyl red indicator •Mannitol •Beaker •Methanol •Distilled water •Electric heater •Ice •Test tube •Test tube rack •Glass rod •Suction funnel •Suction pump •Filter flask •Filter paper •Spatula •Watch glass •Splint Procedures: 1. About 10g
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115 02386600 POA indicators defined as Present on Admission variables‚ which are reported on an inpatient claim‚ indicate the primary & secondary diagnosis‚ that were present at the time the inpatient admission occurs. POA indicators are required for all claims involving Medicare Inpatient admissions to general IPPS acute care hospitals‚ or facilities that are subject to regulations mandating the collection of POA indicator information. POA indicators are used when submitting
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Attitude Indicator (Artificial Horizon) The Attitude Indicator shows rotation about both the longitudinal axis to indicate the degree of bank‚ and about the lateral axis to indicate pitch (nose up‚ level or nose down). It utilizes the rigidity characteristic of the gyro. It is gimballed to permit rotation about the lateral axis indicating pitch attitude‚ and about the longitudinal axis to indicate roll attitude. Once powered up‚ the indicator is maintain in a fixed position no matter what
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Enzyme Activity cheryl yelton November 30‚ 2014 Predictions 1. Sucrase will have the greatest activity at pH 6 2. Sucrase will have the greatest activity at 40 °C (104 °F) 3. Sucrase activity increases with increasing sucrose concentration. Materials and Methods Effect of pH on Enzyme Activity. 1. Dependent Variable. amount of product (glucose and fructose) produced 2. Independent Variable. pH 3. Controlled Variables. temperature; amount of substrate (sucrose) present; sucrase + sucrose incubation
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determined using a Fischer-Johns melting point apparatus. The acid then dissolved in separate beakers with 95% ethanol and water and titrated with 0.050 M NaOH‚ previously standardized with potassium hydrogen phthalate‚ through potentiometric titration. The pH after addition of base was measured and plotted against the volume of titrant added using three different plots. Results show a 61.0% yield and the melting point differed from the theoretical by a range of 3.11-6.83%. The pKa calculated was 2.865‚ differing
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BY: SH The Market Potential Index is used to compare countries that are in transition and entering the markets. This allows companies to determine if a country has the capacity to market a product successfully. Michigan State University Center for International Business Education and Research implements the study on a yearly basis in order to compare and rank the countries on market potential through eight different dimensions with a scale that ranges from one to one-hundred. It is important to
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polyethene polychloroethene polyphenylethylene A student was shown a demonstration in which a sample of an element was heated strongly in air‚ and the powder produced by the reaction was added to water. When tested with a pH probe connected to a data logger‚ the resulting solution had a pH of 9. Which one of the following elements could have been used? (A) (B) (C) (D) S C Si Ca 3. A few drops of bromine water are added to an unknown colourless hydrocarbon. No chemical change was observed after allowing
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