5.06 percent yield lab report answers sheet pdf format

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5.06 percent yield lab report answers sheet pdf format

5.06 percent yield lab report conclusion. 5.06 percent yield lab report prezi. 5.06 percent yield lab report answers. The reason that the product had a higher mass than the reactant is because Mg bonded to O to form MgO, so the product had a higher mass because of the gain of an O atom. List your controlled variables,independent variable, and dependent variable for each part. For help doing this, please see the video or the example calculation below.] Trial 1: .6 gTrial 2: .596 g Percent yield of magnesium oxide [This is calculated via %yield = (actual yield/theoretical yield) x 100] Trial 1: 98.8%Trial 2: 98.3% Average percent yield of magnesium oxide [This will be done by averaging the % yield of your 2-3 trials] STUDENT LAB DISCUSSION Magnesium (Mg) is weighed in a crucible and then heated to create a reaction with O to produce Magnesium Oxide (MgO). This relates to the law of conservation of matter which states that matter is not destroyed or created from nothing, however it can convert from one form to another. [This will be calculated via direct measurement and subtracting the weight of the empty crucible + lid] Trial 1: .362 gTrial 2: .359 g READ: Decomposition of Hydrogen Peroxide Lab AnswersActual yield of magnesium oxide [This will be calculated via direct measurement and subtracting the weight of the empty crucible + lid] Trial 1: .593 gTrial 2: .586 g Theoretical yield of Magnesium oxide [This will done by taking the weight of your magnesium ribbon and converting it to Moles and solving via the Molar ratio. Materials Filter PaperSmall Filter2 Graduated CylindersErlenmeyer flask50mL BeakerScoopula100mL Volumetric FlaskWeigh BoatMass BalanceDistilled Water Procedure Make 100mL of 0.1M by placing 1.110g (?0.001g) into a 100mL volumetric flask, and dissolving it with distilled water. Use only a little distilled water at first to dissolve the solid calcium chloride, then, fill the flask up to the etched line.Make 100mL of 0.1M by placing 3.81g (?0.001g) into a 100mL volumetric flask, and dissolving it with distilled water. Use only a little distilled water at first to dissolve the solid sodium phosphate, then, fill the flask up to the etched line.Prepare the filter paper by folding it into quarters, then opening one side in order to obtain a cone shape. There is also uncertainty associated with the instruments used in this experiment. If the things measured were slightly more than should be this could have affected the concentrations of the solutions, and thus caused a larger reaction than expected. To avoid this in the future, more accurate equipment should be used. For example, pipettes should be used to measure the 10mL of the solution instead of graduated cylinders. For known amounts of reactants, theoretical amounts of products can be calculated in a chemical reaction or process. Trial NumberMass of Dry Filter Paper (+/- .001g)Mass of Filter Paper + Precipitate (+/- .001g)Mass of Ca3(PO4)2 (s) (+/- .002g)10.770g0.950g0.180g20.780g0.960g0.180g30.770g0.980g0.210g40.770g0.960g0.190g50.770g0.950g0.180g Conclusion & Evaluation This percent yield from the reaction was found to be 183%. This number implies that there was a significant error in this experiment, as the amount of precipitate formed was approximately double the expected amount. However, in a reaction to prepare a compound, you may get less than the theoretical yield, because of incomplete reactions or loss. Place the Magnesium ribbon into the ceramic crucible with the lid on. Place the ceramic crucible containing the Magnesium ribbon above the Bunsen burner (see image below). By doing this repeated heating and measurement until a constant value is obtained would ensure all of the Mg ribbon had be oxidized to MgO therefore ensuring max percent yield. Observations Table 1: Qualitative Observations Trial NumberVolume of CaCl2(aq) Volume of Na3Po4 (aq) Mass of Dry Filter Paper (+/- .001g) Mass of Filter Paper + Precipitate (+/- .001g) 110.00mL10.00mL0.77g0.95g210.00mL10.00mL0.78g0.96g310.00mL10.00mL0.77g0.98g410.00mL10.00mL0.77g0.96g510.00mL10.00mL0.77g0.95g Mass of used to make 100mL of 0.1M solution CaCl2(ag) solution= 1.110 (+/- .001g) Mass of used to make 100mL of 0.1M solution Na3PO4 solution= 3.810 (+/- 0.001g) READ: The Energy of Phase Changes Lab ExplainedCalculations Solutions Calculations to produce 100mL of 0.1M solutions Theoretical Yield The reactants were made in 100mL quantities. These need to be scaled down in order to find the mass of each reactant present in 10mL extracts of each reactant. These are the countries currently available for verification, with more to come! United States Canada Mexico American Samoa Guam Northern Mariana Islands Moldova Guernsey South Africa China Israel Japan South Korea Taiwan Australia New Zealand Argentina Brazil Chile Venezuela This is a laboratory report which examines the oxidation of Magnesium and its percent yield. Thus, this experiment found the percent yield of the reaction to be 183%. This suggests that there were errors associated with the procedure as the amount of precipitate formed was almost double the expected value. The errors discussed to address the reasons as to why this occurred, and solutions were provided to avoid these errors in the future and increase the accuracy of the experiment. Weight it and record the value. This is an oxidation reaction because the Magnesium gained Oxygen and oxidized to create MgO. Thank you for your participation! Percent Yield Lab ReportInstructions: For this investigative phenomenon, you will need to determine the percent yield of magnesium oxide from the given reaction to determine if it is a useful commercial process.Record your data and calculations in the lab report below. Explain why these are the variablesfor each part of the lab. Related Posts The purpose of this investigation is to explore the percent yield of the precipitate in the reaction. LAB DATA Data Trial #1 Trial #2 Weight of empty crucible + crucible lid (grams) 26.698 g 26.687 g Weight of Mg metal + crucible + crucible lid (grams) 27.060 g 27.046 g Weight of Magnesium oxide + crucible + crucible lid (grams) 27.291 g 27.273 g LAB CALCULATION Mass of magnesium metal. The above reaction will produce a solid precipitate and an aqueous solution. These products will be separated by filtration and the precipitate will be collected in filter paper. It will dry overnight and then be weighed. The mass obtained will then be compared to the theoretical yield, in order to determine the percentage yield of the reaction. It is a very common lab report assignment for high school students across North America and the UK. Your theoretical yield calculation serves as your prediction for what you expect the lab to produce, and that will be determined later in the lab.Procedure:Access the virtual lab and complete two trials of the experiment. The amount of MgO formed will be dependent on the amount of Magnesium ribbon used, along with avoidance of human error (i.e incorrect weighing or loss of experimental product). Also, this could have been due to impurities in the reactants. If the solid calcium chloride and sodium phosphate were not completely decomposed in the distilled water this would cause the actual yield in the reaction to be higher than the theoretical yield of the reaction. More specifically, if the limiting reactant was not completely decomposed, there would be an excess of the other reagent remaining in the product. This would add to the weight of the product, resulting in a high percentage yield. In the future, the solutions should be mixed and allowed to sit for a few hours, to ensure that all of the solid particles are fully decomposed. Cover the crucible and heat strongly for approximately 5-10 minutes.Turn off the Bunsen burner and when safely cooled, weight the entire ceramic crucible containing the Magnesium with the lid on; record the value . This skewed result could have been caused by certain external factors. Firstly, because the precipitate was left to dry overnight, it could have accumulated dust, as well as reacted with other particles in the air to increase its weight. Thus, the product is impure. Precautions were made in order to avoid this, by placing the wet filter sheets into a closed environment. However, it was not completely sealed, thus allowing for this error. This factor can be eliminated in the future by placing the filter sheets in a completely sealed environment to dry overnight. In these calculations, the limiting reactant is the limiting factor for the theoretical yields of all products. See Balanced equation: LABORATORY PROTOCOL: This lab can be performed as an individual or with a partner (Recommended for Grade 10 and above) Obtain the following items: Clamp stand, Bunsen burner/ Hot plate, ceramic tile hot plate, ceramic crucible with its accompanying lid, Tongs, Protective eye ware and gloves.Begin by weighing the ceramic crucible with its accompanying lid; record the value.Obtain approximately 20-25cm of Magnesium ribbon provided to you. Place filter paper into the filter. Then, place the filter into the Erlenmeyer flask.Measure 10.00mL ofMeasure 10.00mL ofMix the 10mL of and 10mL of into a beaker. Stir for approximately 5 seconds.Pour this solution into the prepared filter.Allow all of the liquid to drain into the Erlenmeyer flask.Remove the filter paper from the filter. Place it onto a glass plate and allow the filter paper with the precipitate to dry overnight in a closed environment.Measure and record the mass of the dried filter paper with precipitate.Repeat steps 3-11 five times. The Magnesium ribbon will be heated a fix rate in a ceramic crucible to it form its byproduct: MgO via oxidation/ synthesis. Related Posts Of note, some experimental protocols instruct students to reheat the crucible and Magnesium ribbon several times and re-measure the weight each time (continuing until the final mass value is repeatedly constant). Measure the mass of the dry filter paper. You will submit your completed report.Title: Percent Yield LabObjective(s):In this experiment, you will examine the reaction between magnesium metal and oxygen gasHypothesis:No hypothesis needed for this lab. Calculated amounts of products are called theoretical yield. Summarize the steps of the experimental procedure.Independent variables Controlled variables Dependent variablesEmpty crucible Amount of mg metal Mass of Mg metal, crucible,and lidLid Bunsen burner burning time Mass of empty crucible withlidMaterials ? the materials are Cooling time Mass of MgO, crucible, andThis study source was downloaded by 100000778177063 from on 04-27-2022 10:03:35 GMT -05:00 You're Reading a Free Preview Page 3 is not shown in this preview. The amount recovered divided by the theoretical yield gives a percent yield (% yield) or actual yield. The report will look to understand the percent yield of Magnesium Oxide (MgO) after heating varying amounts of Magnesium via a conventional Bunsen Burner or Ceramic hot plate.

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