Then carefully and slowly add 5.30g of Na2Co3 into the volumetric flask until it reaches the exact measurement. After removing the volumetric flask off the scale‚ Slowly add diluted water into the volumetric flask until it reaches exactly 100 millimeters. Cover/seal the top opening of the volumetric flask with parafilm and mix the solution by placing your thumb on top of the parafilm and flipping the flask back and forth (wait
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exactly the same way while accuracy indicates the closeness of the measurement to its true value. This experiment was used to determine the accuracy and precision of different volumetric measuring devices‚ as well as determining the density of an unknown metal. This lab was to help understand the application to volumetric measurements. Part 1: First‚ the next-to-smallest beaker was cleaned‚ dried‚ and weighed on the scale where it’s mass was determined. The container was then tared so the scale
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salts - often a sodium salt. Objectives: 1. Measure the pH of the unknown solution first with indicators and then with pH paper. 2. compare the buffer solution with both a strong acid and a weak acid materials: 2 30 mL beakers 2 100mL volumetric flask 1 10mL pipet 2 aspirator 1 50mL graduated cylinder 1 10mL graduated cylinder 1 50mL beaker 1 100 mL beaker 1 glass stir rod 1 ring stand 1 clamp 1 250mL beaker Distilled water pH paper reagents: 10mL 6M acetic acid 10g solid
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100 ml volumetric flask. * Made up the volume to 100ml with 0.1N NaOH. * Transferred 2 ml of the above solution in a 100 ml volumetric flask. * Made up the volume to 100 ml with 0.1N NaOH. * Filtered the above solution in a test tube. Preparation of the Standard Dilution: * Weighed about 51 mg of the standard. * Transferred it in a 100 ml volumetric flask. * Made up the volume to 100 ml with 0.1N NaOH. * Transferred 2 ml of the above solution in a 100 ml volumetric flask.
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x 1000 = 14.7 cm3 Distilled water required: 250 cm3 – 14.7 cm3 = 235.3 cm3 1) Measure 14.7 cm3 of H¬2O2 using a 20 cm3 graduated pipette (with a pipette filler) and transfer to a 250 cm3 volumetric flask. 2) Rinse the pipette filler with distilled water and pour the washings into the volumetric flask. 3) To dilute the solution fill the flask with distilled water until it is 5mm below the calibration line. 4) Use a dropping to add the final quantity of distilled water until the bottom
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The equipment needed when making standard solutions includes; a volumetric flask‚ a glass beaker‚ two plastic weighing boats‚ scales‚ a spatula‚ and the sodium hydroxide. When using glassware in experiments‚ it must be flushed out to make sure that cross contamination does not happen and that the only thing that would then be coating the beaker is the distilled water. When all of the glassware has been cleaned‚ some sodium hydroxide should be placed in a plastic weighing boat next to the scales
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Title: Introduction to Spectrophotometric Analysis Introduction: Spectrophotometric Analysis which is one of the most common and valuable analysis techniques used to study the interaction of electromagnetic radiation with chemical compounds (Stewart & Ebel‚ 2000). By using spectrophotometric analysis or spectrophotometry‚ one can determine the identity in terms of structure and species of a biomolecule as well as establish the concentration of a certain biomolecule (Stewart & Ebel‚ 2000).
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test tube to the water in the beaker. The solution changed from dark green to bright blue. After the solution cooled‚ it was transferred to a clean 250 mL volumetric flask. The test tube that contained the nitric acid solution was rinsed and those rinses were also added to the volumetric flask. DI water was added to the mark on the volumetric flask. The flask was stoppered and inverted three times to ensure the solution was
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Aims To investigate the effect of varying the concentration of H2O2 has on the reaction‚ and to determine the respective order of reaction. To investigate the effect of varying the concentration of KI has on the reaction‚ and to determine the respective order of reaction. To investigate the effect of varying the temperature has on the reaction‚ and to determine the respective order of reaction. To investigate the effect of introducing Ammonium Molybdate to the reaction Arrhenius stuff
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sample preparation _ Class 1 standard reference solution: Transfer 1 ml of the USP reference standard for residual solvent class 1 to a 100 ml volumetric flask. Add 9 ml of DMSO. Dilute to volume with water and agitate. Transfer 1 ml of this solution to a 100 ml volumetric flask‚ dilute to volume and agitate. Transfer 10.0ml of this solution to a 50ml volumetric flask dilute to volume and agitate. _ Class 1 residual solvents standard: Transfer 1 .0ml of the reference solution to a headspace vial of
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