Burner • Water • Funnel • Retort stand • Funnel Paper • Sieve • Iron Filings • CaCO3 • NaCl • tripod • Gauze Mat • Cling Wrap • Saftey Goggles Method: 1. Gather Apparatus and the mixture of Iron‚ CaCO3 and NaCl. 2. Weigh beaker and mixture. 3. Use magnetic separation to remove Iron filings. 4. Set up retort stand and add filter paper to the filter funnel. 5. Put the rest of the mixture into the filter funnel and add water slowly to filter out the water and dissolved NaCl. 6. Evaporate
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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‚ the solid masses of BaSO4 were attained. With a gravimetric factor of 1:1‚ sample 1 resulted in the formation of 0.5874g BaSO4 from 0.4004g of SO42-‚ while sample 2 resulted in the formation of 0.4073g BaSO4 from 0.3985g of SO42-. The two samples
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do this‚ a ring stand must be set up with an iron ring and a glass funnel. Take a piece of filter paper and fold it as demonstrated by Mrs. Montoney‚ and place it in the funnel. 8. Place a 250mL beaker under the funnel for the filtered water. 9. Put the remaining mixture in the funnel. 10. Pour some water in a beaker‚ record the amount of water and pour it in the funnel. The mixture will begin to filter and drain the salt‚ leaving behind the sand. More water may need to be added depending on
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| Mass of M2CO3 | 2.031 g | Mass of Filter Paper | 0.969 g | Mass of CaCO3 | 1.5782 g | Moles of CaCO3 | 0.01577 moles | Molar Mass of M2CO3 | 128.79 g/mol | Identity of M2CO3 | K2CO3 (potassium carbonate) | Percent error | 6.8% | Calculations and Graphs: Mass of M2CO3 Mass of Crucible and M2CO3 minus Mass of Crucible = mass of M2CO3 27.752 g – 25.721 g = 2.031 g Mass of CaCO3 Mass of Filter Paper and CaCO3 minus Mass of Filter Paper = Mass of CaCO3 2.551 g – 0.969 g = 1
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Quantitative Separation of a Mixture Lab Pre-Lab Questions: 1. Define the following: Physical Change Heterogeneous Mixture Sublimation Filtrate Residue 2. List two physical separation methods. 3. List the formula for determining percent composition by mass. Objectives: 1. to separate a three component mixture and 2. determine the percent composition by mass of each component in the mixture. Materials: Ammonium chloride (NH4Cl)‚ Sodium chloride (NaCl also known as
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THE GRAVIMETRIC DETERMINATION OF SULFATE Learning Goals. 1. To determine the amount of Sulfate in an Unknown sulphate sample. 2. To perform and develop skills in precipitation Gravimetric method of quantitative analysis. DISCUSSION: Gravimetric analysis is one of the oldest analytical techniques and for this reason is referred to as a "classical method." Gravimetric procedures are usually very accurate‚ but more tedious than other methods. The only major equipment needed
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(25 mL)Filter paper (Whatman No. 1—three 12.5 cm sheets)Sodium chloride/charcoal mixture (4 g)Sodium chloride/copper(II) chloride mixture (8 g)Ethanol (25 mL)Distilled waterBoiling chipProcedureA Separation of a Sodium Chloride and Charcoal Mixture#1 Place 4 g of the salt/charcoal mixture in a 100 mL beaker and add about 15 mL of distilled water. Stir the mixture for about two minutes to allow the salt to dissolve. #2 Set up a filter funnel with filter paper on a filter funnel stand. Filter the mixture
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the calculated amount and put it in a small paper cup. Add 25mL distilled water and stir. 5. Pour this solution into the beaker and watch as a precipitate forms instantly. 6. To set up a filtration assembly: a. Set a small paper cup inside a slightly larger coffee cup. b. Fold a sheet of paper in half and then in half again. c. Open one section of the folded filter paper. d. Place the opened filter paper into the funnel‚ and the funnel into the paper cup. 7. Swirl the contents of the beaker
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Name: Alfredo del junco Date: 2/22/2014 ET 1410 Final Exam 1. 1. An IC op-amp has ________. a. two inputs and two outputs b. one input and two outputs c. two inputs and one output d. one input and one output 2. In the common mode‚ ________. a. both inputs are grounded b. the outputs are connected together c. an identical signal appears on both inputs d. the output signals are in phase 3. If Av(d) = 3500 and Acm = 0.35‚ the CMMR is ________. a
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laboratories for a pharmaceutical company developing and maintaining standards to ensure consistency in the production of medicine. Procedure: First a weigh boat was weighed as precisely as possible‚ and then the weigh boat was weighed with a filter paper placed inside it. Next‚ about 0.2 grams of the unknown nickel compound C was weighed in a clean beaker. The mass of the unknown was determined as precisely as possible. The sample was put in about 20 mL of deionized water and stirred together until
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