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Procedure
Describe the procedure that your group used to separate the water-soluble components of the fertilizer from the water-insoluble components. Then describe how the phosphorous compound was precipitated and analyzed. Be sure to include any deviations from the procedure outlined in the lab manual.
This should NOT be a complete reiteration of everything written in this section of the laboratory book. This section is also written in paragraph form and in full sentences. Formal lab reports are written in the third person passive voice, past tense. Never use the words “I” or “we” in a formal lab report. For instance, do not write “We determined the volume of a glass bead using the displacement method.” Instead, state “The volume of a glass bead was determined through the displacement method.”
Data
Create and fill out the data table for Part II in the data tab of the excel file Chem L111_Gravimetric Analysis of P_YOUR NAME, and then copy and paste it here.
Discussion (Report Section in the Lab Book)
Fill out Table 1: Group Results in the discussion tab of the excel file Chem L111_Gravimetric Analysis of P_YOUR NAME, and then copy and paste it here.
Fill out Table 2: Class Results in the discussion tab of the excel file Chem L111_Gravimetric Analysis of P_YOUR NAME, and then copy and paste it here. Don’t forget to include the average and standard deviation in the last two rows.
Discuss the following questions with the members of your group. Incorporate the answers into a cohesive discussion in paragraph form as if you were writing a formal report to the fertilizer company with the results of your independent analysis of their product.
• Discuss your methods and results. Are your results accurate? Precise? Are your group’s results consistent with the class data? Refer to your data tables in this discussion.
• The large amount of potassium also present in fertilizers could cause the formation of MgKPO4.6H2O in addition to the desired precipitate. When you calculated the percentage by mass of P in the fertilizer, you assumed the precipitate was only MgNH4PO4.6H2O. If some of the solid was actually MgKPO4.6H2O, would your calculated percentage be too high, too low, or unaffected? Explain.
• The fertilizer is a mixture of solids. Can it be a completely homogenous mixture? Explain. What impact does this have on the precision of your analyses?
• Fertilizer companies commonly overformulate their fertilizers; that is, the actual content is higher than what is promised on the label. What impact could this have on the results of your analyses? Do your experimental results support the idea that the fertilizer was overformulated? Explain.
References
Be sure to reference any/all outside resources that are used to write your formal lab report. This includes your textbook.
————> Please use my OWN data that I will be provided.
Write the exact same procedure that I wrote in my lab notebook.
 
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Unlimited Free Revisions,Applicable lab: Gravimetric analysis of phosphorous