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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Contrary‚ when a reaction releases heat out to its surroundings it is described as an exothermic reaction. Method: Small strips of Magnesium (0.2480g) were added into a precise measurement of 5mL of 1M Sulfuric Acid (measured with a transfer pipet) within
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hotplate 5. 2 magnetic stirring bars 6. Crystallalizing dish (for water bath) 7. 2 beakers 250 mL 8. Contact thermometer 9. Conductivity measuring cell 10. Temperature probe 11. Graduated measuring pipette 15 mL 12. Volumetric pipette 25 mL 13. Volumetric pipette 50 mL 14. 3 pipet bulbs 15. Tea bag Method/Procedures : 1. The apparatus was set – up as shown below in the Figure 1.1 2. 94 mL of distilled water and 49 mL of methanol were pipetted into a beaker which was placed in a
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my experiment If I was to improve my experiment I could attempt to read the burette to the bottom or top of the meniscus by doing this it might give me accurate results for my experiment. Another way of improving my experiment could be that I use volumetric pipettes for measuring. Calculate the maximum percentage error in the average titre value. Percentage error = maximum error x 100% Value of
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Hydrogen peroxide and iodide ions Aim: To determine the rate equation for the reaction between Hydrogen peroxide and iodide ions‚ and to investigate the effects of a catalyst and temperatures on the reaction and to derive the activation enthalpy. Background knowledge: 1Hydrogen peroxide reacts with iodide ions producing iodine‚ when in an aqueous acid solution. H2O2 (aq) + 2I- (aq) + 2H3O+(aq) I2 (aq) + 2H2O(l) To detect iodine you can look at the color shown by the addition of starch
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SYNT m o d u l a r · l a b o r a t o r y · p r o g r a m · i n · publisher: H. A. Neidig c h e m i s t r y 738 organic editor: Joe Jeffers Copper-Catalyzed Oxidation of Benzoin to Benzil prepared by Carl T. Wigal‚ Lebanon Valley College PURPOSE OF THE EXPERIMENT Oxidize benzoin to benzil using ammonium nitrate and copper(II) ion as a catalyst‚ monitoring the reaction by thin-layer chromatography. Characterize the product using melting point measurement and infrared spectroscopy. EXPERIMENTAL
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Chemistry Lab Report on standardization of acid and bases. Purpose: To prepare standardize solution of sodium hydroxide and to determine the concentration of unknown sulfuric acid solution. Data and Calculations: This experiment is divided into two parts (Part A and Part B). In the first part of experiment‚ the standardize solution of sodium hydroxide is prepared by titrating it with base Potassium hydrogen phthalate (KHP). The indicator Phenolphthalein is used to determine that whether titration
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the first derivative were measured at 448 and 300 nm for the determination of VAL and SAC‚ respectively‚ Fig.4. Absolute derivative values‚ at the selected points‚ were plotted against the corresponding concentration of each drug‚ to obtain the calibration graphs. After that‚ the corresponding regression equations for each drug were derived. The direct method of using the RFI at λem of each drug (416 and 314 nm for VAL and SAC respectively) was used for comparison with the proposed D1
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a Can of Coke? Abstract: A 50mL (we used 100mL) volumetric flask was used to determine the amount of sugar in a can of Coke per mL in 5 different solutions. Using the calibration curve we determine the amount of sugar per mL in a can of coke. This experiment concluded that there is 43.83g of sugar in a 12oz can of Coke. Introduction: This experiment was conducted to determine the amount of sugar in a can of Coke and to and use a calibration curve. 5 different solutions were made‚ each containing
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100.1 g CaC03/ 1 mol CaCO3 Above in the formula V represents the actual delivered volume of Na2EDTA solution and M is your actual molarity. Procedures: Start by preparing 500mL of 0.004 disodium EDTA solution. This is what will be added to the buret. Next take a 250-mL Erlenmeyer flask and add 10.00mL of standardized calcium and 30mL of deionized water. Place a magnetic stir-bar in the flask and set on top of a piece of white paper on a magnetic stirrer. After place 3mL of ammonia/ammonium chloride
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