Lab #16: Gravimetric Analysis of Metal Carbonate Introduction: In this laboratory the identity of group 1 metal Carbonate is determined gravimetrically using a double replacement precipitation reaction. Concepts: Double-Replacement reaction Gravimetric analysis. Background: The identity of group 1 metal M is determined by analyzing an unknown Group 1 metal carbonate‚ M2CO3. There are 3 main reactions in this lab: 1. Equation 1: M2CO3 (s) → 2M+ (aq) + CO32- (aq) 2. Equation 2: Ca2+
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Drain the bottom layer into a conical flask because now the caffeine is extracted into the dichloromethane layer. Cover the mouth of the conical flask to avoid evaporation of the solution. 9 Dry the combined dichloromethane solutions using drying agent - anhydrous Sodium sulfite. Add 1 teaspoon to the solutions until it no longer clumps together at the bottom of the flask. Mix well and leave it for 10 minutes. 10 Pour the dichloromethane into a conical flask (100ml). 11 Let the solvent - dichloromethane
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Experimental: Benzyltriphenylphosphonium chloride (0.201g) and 9-anthraldehyde (0.116g) were weighed and added to a short-neck round-bottomed flask (5ml). Dichloromethane (2ml) was measured using a measuring cylinder and added to the flask‚ and every solid material was washed down the bottom of the flask. The flask was then stirred using a magnetic stirrer at high speed whilst adding 50% aqueous sodium hydroxide (0.25ml) drop wise using a pipette. After complete addition of
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Introduction 3 Results 4 Discussion 6 Conclusion 7 Experimental 7 References 8 Preparation of 2-Acetylcyclohexanone Introduction When hydrogens are present on the α-carbon of ketones (like the reaction used in this experiment)‚ carbonyl compounds and aldehydes‚ they turn the compound slightly acidic1. These functional groups are removed by using a basic solution as shown in (i) below1. The product formed with water is stable only due to resonance‚ but does
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mass; however the density was determined indirectly by the use of four different techniques: burette‚ Mohr pipette‚ volumetric pipette‚ and a volumetric flask. For each technique‚ a system was put in place to determine how much a volume of solution weighed. An empty flask was used to contain a delivered amount of solution. The mass of the flask was taken before the addition of the solution and then again after the addition. By difference‚ it was determined how much the solution weighed for a certain
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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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method steam distillation‚ using a 500 mL three-necked round-bottomed flask. A 125 mL Erlenmeyer flask was used as a collection flask. Placed 7 g of clove buds/ground cloves into the flask and added 150 mL water. Began heating with a Bunsen burner to create a steady rate of distillation. While distilling‚ we continued to add water from the addition funnel‚ as needed‚ to maintain the level of the liquid in the distilling flask. Continued until 75 mL was collected. Chilled. Emptied the water from the
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value might need to be altered due to various conditions and errors. Objectives The objective of the experiments was to; Calibrate a 10 mL volumetric pipette. Calibrate a 25 mL volumetric pipette. Calibrate a 100 mL volumetric flask. Calibrate a 50 mL measuring cylinder Introduction Volumetric glassware is used to accurately measure volumes. Despite all of the tools and instruments available for the use of measuring values of various data‚ it is impossible
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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 of the meniscus is level with the 250 cm3 mark. 5) Stopper the flask and invert it 10 times to ensure the solution is completely mixed.
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Shouji). Materials and Methods Reflux apparatus assembly Using a condenser‚ Claisen adapter‚ and a 25 mL round-bottom flask‚ a reflux apparatus was assembled. The round-bottom flask‚ which had Anisole (.55g)‚ a boiling chip and dichloromethane (5 mL) directly added to it‚ was attached to the Claisen adapter‚ which had a rubber septum in the opening directly over the flask. The condenser was attached to the other opening of the adapter. The top of the condenser was fitted with a rubber stopper
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