be determined to the nearest 0.01 mL with practice. Clay triangles are placed on a ring attached to a ring stand as a support for a funnel‚ crucible‚ or evaporating dish. Droppers are for addition of liquids drop by drop Erlenmeyer flasks are useful to contain reactions or to hold liquid samples. They are also useful to catch filtrates. Glass funnels are for funneling liquids from one container to another or for filtering when equipped with filter paper. Graduated cylinders are for
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Abstract Gravimetric analysis describes the methods for finding the chemical constituent of analyte in a solution through analytical chemistry. This method uses the mass of solid SO42-‚ with an unknown quantity and quality‚ to qualitatively determine the makeup of the solid SO3-. Two separate experiments with the initial compounds of BaCl2 and SO42- were put into solution to allow for the BaSO4 precipitate to form. Through filtration and ignition of precipitate containing ashless papers
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Chemical reactions are a part of everyday lives. Whether it is the burning of propane at a kitchen stove‚ or washing detergent reacting with dirt stains‚ chemical reactions are useful tools that have widespread applications. With so many reactions assisting our everyday activities‚ it is important that ways to optimise reaction rates are investigated. “Reaction rate‚ the speed at which a chemical reaction proceeds… may be defined in terms of the amounts of the reactants consumed or products formed
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PURPOSE The purpose of this experiment is to become familiar with the separation of mixtures of solid and learn separation techniques based on the chemical properties of a substance. PROCEDURES 1. Separating out the Iron a. Use your digital scale to determine the mass of your weighing dish. b. Empty the entire mixture of solids from the plastic bag into the weighing dish and determine the gross mass of the total mixture and weighing dish. Compute the net mass of the mixture: this is equal
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The major component of tea is cellulose which is a polymer of glucose. Materials Lab coat Goggles Graduated cylinder 1 tea bag (1.615g) 50 mL beaker Ice Gloves Hot plate 500 mL Erlenmeyer flask 30 mL DI water Wash glass Ca2CO3 DCM Funnel Stopper Methods In this experiment the caffeine is extracted from tea leaves by hot water. From the aqueous extract the caffeine is isolated by multiple extractions with small portions of dichloromethane. In a 500 mL Erlenmeyer flask we placed
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burette‚ distilled water‚ cleaning utensils‚ stand‚ funnel‚ solutions( NaOH and KHP) Procedure: 1. Gathered all materials required 2. Wore proper safety equipment 3. All the equipment was washed and gathered. 4. The base (NaOH) and the acid (KHP) were labeled and put into conical flasks and beakers. 5. A rod was screwed into the hole which is in the desk. Also a clamp was placed on the rod. 7. The burette was placed on the clamp. 8. The funnel was rinsed with some acid (KHP) from the inside
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mixture (add water if necessary to keep volume constant. 8. Pour the distillate into a separate funnel and add 20mL of water stopper and then shake. (the butyl bromide layer is the LOWER layer) 9. Decant the lower layer into a fresh Erlenmeyer flask. 10. Clean and dry the separatory funnel and place the butyl bromide into it. 11. Thoroughly cool 20ml of conc H2SO4 in an ice bath and add to funnel. . 12. Shake carefully and VENT. 13. Separate the layers and test for the organic layer. 14. Wash
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acetic acid‚ and 4.39-mL of 6% NaOCl solution were mixed in a 125-mL Erlenmeyer flask. Another 35-mL of 6% NaOCl solution was added to a separatory funnel and supported over the flask. The NaOCl in the sep funnel was slowly added into the Erlenmeyer flask with vigorous swirling‚ approximately 2-mL every 30 seconds until all the NaOCl from the sep funnel had been added. The temperature of the reaction mixture was closely monitored using a thermometer to make sure the temperature did not rise above
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solutions (looks like water) • to remove color (really trace contaminants)‚ add activated charcoal (adsorbs the impurities) 4) ONLY IF NEEDED: Gravity filter to remove insoluble materials (including charcoal!) • use fluted filter paper and a hot‚ stemless funnel NOTE: IF THE SOLUTION COOLS‚ PRODUCT WILL CRYSTALLIZE OUT & BE LOST! • use a small amount of hot solvent to rinse flask‚ filter 5) Crystallize solute (Finally! This is the RECRYSTALLIZATION part!) • cool the solution slowly: hot (boiling) → room temperature
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heated very carefully to allow it to dry. After the sand was dried it was weighed. The benzoic acid and salt were separated. A filter paper was inserted in the funnel and the cup with the salt and benzoic acid was poured into the funnel. A graduated cylinder with 5mL of water was inserted into the ice bath; this was poured into the funnel to eliminate any of the sodium chloride that may have been missed. The filter paper was laid out on several paper towels to dry. After the filter paper has dried
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