Experiment 07 – Stoichiometry – Part 1

Experiment 07 – Stoichiometry – Part 1

CHM 1045L – Fall 2020 – PBSC

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Name: Click or tap here to enter text. Date of Experiment: Click or tap to enter a date.

Pre-lab Setup

Type out the chemicals used in this experiment, their hazards if applicable, and any other safety concerns associated with this experiment.

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Type the procedure for this experiment in your own words, as though you were completing this experiment in the lab yourself. Feel free to use a bullet list (avoid huge paragraphs).

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Pre-lab Questions

1. What is the balanced chemical equation for the reaction of aluminum with copper(II) sulfate? Copper solid and aluminum sulfate are produced. Remember to use the shortcuts learned in Experiment 4 for subscripts.

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2. According to the reaction in question 1 above, how many grams of solid copper will theoretically be produced when 2.2 g of aluminum are reacted with 14.4 g of copper(II) sulfate? Which reactant is the limiting reactant? Show your work for this problem at the end of this worksheet.

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3. A reaction that produces ibuprofen has a 87% yield. If the theoretical yield of this reaction is 43.6 g, how many grams of ibuprofen will actually be produced?

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Calculations/Work

1. Add a picture of your work for pre-lab question #2 below. Be sure to include units!

Data

Table 1. Synthesis of Alum Reaction. Use the Excel document for your data collection (instructions in document). Refer to the introduction of the lab manual to do the calculations.

Data / Calculated Values

Trial 1

Trial 2

Trial 3

Mass Aluminum Foil (g)

Mass Filter Paper (g)

Mass Filter Paper + Product (g)

Mass Product (g)

Moles Al

Theoretical Yield of Alum (mol)

Theoretical Yield of Alum (g)

Percent Yield of Alum

Post-lab Questions

1. What was your average percent yield of Alum? Show your work for all steps of ONE TRIAL at the end of the worksheet. Make sure all steps are labeled and include units.

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2. List two possible steps where product yield may be lost (why your actual yield was lower than the theoretical yield). Use the YouTube video linked in the Excel file for ideas. Be specific about the steps and explain how they might have affected your yield.

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Reason: Click or tap here to enter text.

Way 2: Click or tap here to enter text.

Reason: Click or tap here to enter text.

Calculations/Work

1. Add a picture of your work for your theoretical AND percent yield calculations below. Be sure to include units!

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