Reactions of Copper and Percent Yield

chemical reactions of bruiser and Percent YieldPurpose-The purpose of this experiment is to examine the chemistry of papal bull and with the concept of percent birth. /2Procedure- CHEM16882, Applied Chemistry1 Laboratory Manual Experiment no.6 posted on slate/Sheridan college, Brampton (accessed on 20.feb.2017) (1). /2ObservationsCreate your own data circuit board for quantitative data. The table must include all the measurements you recorded in the research laboratory it must have a table number and title.Answer- put back for quantitative data thrifty while conducting the experiment.CompoundMass(+ /- 0.0001g)Initial weight of copper0.5189g final weight of copper0.5651gWeight of 250 ml empty beaker117.29gEvaporating dish56.2529gFinal weight of copper + evaporating dish56.8180g /4In table format record qualitative observations for severally of the five reactions. All observations must be written in have a go at it sentences. The table(s) must have a table number and title.Ans wer-Table 1.Reaction 1. Cu + bodily stateThe corporal state of copper is solid.The physical state of nitric acerb is liquid.Copper2 process is liquid in nature.Nitrogen dioxide is a gas.Water i.e. dihydrogen monoxide O ) is a Liquid.ColorThe color of copper is brownNitric acid is clear.Copper 2 nitrate is in Blue green color.Nitrogen dioxide is in brownish shadeDihydrogen monoxide is Clear.ADDITIONAL OBSERVATION-Heat is generated during this experiment.Table 2.Reaction 2. CuPhysical stateThe physical state of copper nitrate is Liquid.The physical state of sodium hydroxide is Liquid.Copper hydroxide is Solid in nature.Sodium nitrate is in Liquid form.ColorIt is in Blue green color.It is Clear.It is Black in color.It is in Dark blue color.ADDITIONAL OBSERVATION-Blue precipitates are formed when NaOH is added.Table 3. Reaction3. CuPhysical stateThe physical state of copper hydroxide is Solid.Copper hydroxide is Solid.The physical state of dihydrogen monoxide is Solid.ColorIt is Da rk blue in color.It is in Black color.Table 4.Reaction 4. CuO + Physical stateThe physical state of copper hydroxide is solid.Sulphur acid is in Liquid form.Copper hydroxide is liquid.The physical state of dihydrogen monoxide is Solid.ColorIt is in Blackish tone.It is Colorless.It is Light blue in color.Table 5.Reaction 5. CuPhysical stateThe physical state of copper sulphate is Liquid.Zinc is a Solid.Zinc sulphate is solid in nature.Copper is in Solid form.ColorIt is Black in color.It is Silver in color.It is Colorless.It is Reddish/brown in color.ADDITIONAL OBSERVATION-Heat is generated during this reaction.Write balanced chemical equalitys for each of the five reactions. Identify and name the product(s) for each reaction. express whether the product is a solid, liquid or gas.Answer-Reaction 1Reaction 2Reaction 3Reaction 4Reaction 5/5For each of the five reactions, identify the type(s) of reaction each is. Your choices are decomposition reaction, oxidation-reduction reaction, ac id-base reaction, combustion reaction, single displacement reaction, double displacement reaction and synthesis reaction.Answer-Reaction 1.It is a decomposition reaction.Reaction 2.It is a double displacement reaction.Reaction 3.It is single displacement reaction.Reaction 4.It is Acid Base Reaction.Reaction 5.It is a redox Reaction i.e. oxidation reduction reaction because zinc loses 2 of its electrons and copper gains 2 electrons. /3CalculationsAll figurings must show the equation used (typed with equation editor), units must be present with all numbers and the final answer must be recorded with the correct number of significant figures. 1. Calculate the % yield of Cu at the end of the five reaction steps. (This could also be referred to as the % recovery of Cu.) Show ALL calculations.Answer- Actual tummy of copper=0.5189gFinal mass of copper obtained=Mass of evaporating dish and copper (g) Mass of empty flat evaporating dish(g)=56.8180g-56.2529g=0.5651g=0.56gPercentage yield % = =/32. For Reaction 1 between Cu and HNO3, calculate the theoretical yield of Cu(NO3)2 in grams.Answer-Reaction 1. Molecular mass of Cu =63.546g/molMolecular mass of HN=63.01284g/molMolecular mass of =187.554g/molMole of Cu =Theoretical yield of =/33. For Reaction 1 between Cu and HNO3, confirm that HNO3 was present in excess. (Show a calculation to support your answer) Answer- Reaction 1. Molecular mass of Cu =63.546g/molMolecular mass of HN=63.01284g/molMolecular mass of =187.554g/molMole of Cu =Theoretical yield of =/24. For Reaction 2, calculate how many moles of NaOH you added.Answer-Reaction 2Molecular mass of =187.54g/molMole of NaOH=1.4g /2QuestionsWhat compound was world removed(p) in the procedural step where cl mL of hot R.O. water was added to the solid CuO precipitate? Do you think that all of this compound was removed by this washing? How could this error affect your percent yield? How could this error be minimized?Answer-Hydroxide atoms was being removed in the ste p of procedure where 150 ml hot water was added to CuO solid precipitate.No, I dont think so that all of compound was taken off by washing it. Some particles were added by human error, which outcomeed in increased amount of the product which affected the final result i.e. percent yield of copper.The chances of error can be reduced by various methods. One such method is by making some changes in procedure i.e. washing of precipitates entirely until the particles are removed thoroughly or by increasing dissolution process./62. List two errors that could increase your % yield and two errors that could decrease % yield. Describe one of each type in details.Answer Two errors that may eliminate during conducting the experiment which could increase the % yield of copper are as follows-By human error, i.e. while washing method some of the water cannot be removed from NaNO3 particles from copper hydroxide particles which will result in increased mass of final product.In the final result w e got more mass than the actual mass because zinc does not fully react with CuSO4. Some particles still remain inside with the copper.Two errors that may occur during the experiment which could decrease %yield are as follows-Some particles remain left inside the beaker while transferring from one to another which reduced the weight resulted in %yield.Some particles get transferred into the beaker with water and there was loss in the weight which affected the result and we get more mass than actual mass value. /8Conclusion(s) /3To sum up, the final mass of copper which is obtained after performing the experiment was greater than the initial copper mass.Reference(s)1.https//slate.sheridancollege.ca/d2l/le/content/348286/viewContent/5357151/View (accessed on 20.feb.2017)2. AC1 Experiment 6/Template_Copper Percent Yield, Ques 2./2Teacher Evaluation (Students leave this part blank)Overall organization of lab report formatting of chemical and mathematical equations clarity of answers spe lling and grammar attention to details completed cover sheet use of headers and footers.Laboratory performance punctuality time management team get going attention to safety use of personal protection equipment using appropriate lab techniques preparation of lab data book in advance of the lab cleanup of lab work area./5Total laboratory grade /55Professors suggestions for improvement