Lab 3 - Recycling Alumnium

# Lab 3 - Recycling Alumnium - Recycling Aluminum 1 Results...

• Notes
• 3

This preview shows pages 1–3. Sign up to view the full content.

Melting points of alum sample Recycling Aluminum September 31, 2007 1

This preview has intentionally blurred sections. Sign up to view the full version.

Results and Discussion: The process for creating alum on a large scale was reduced by multiplying each value in the procedure by .10787. The goal of this was to reduce the expected amount of alum to a manageable 23 grams. Also, the alum created should be pure. The procedure was reduced and a final mass of 9.81 grams of alum was measured. The percent yield was calculated as follows: Actual yield Percent yield = x 100 Theoretical yield 9.81 g Percent yield = x 100 23.0 g Percent yield = 42.7% The purity of the alum sample was determined by comparing melting points. Two trials
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: were conducted to ensure accuracy. The results are displayed in the figure below. Trial Start Complete 1 86 oC 90 oC 2 88 oC 91 oC The average of the range was taken. The calculations are as follows: (T1 s + T2 s )/2 = (86 oC + 88 oC )/2 = 87 oC (T1 c + T2 c )/2 = (90 oC + 91 oC )/2 = 90.5 oC The average range was determined to be 87 oC to 90.5 oC Conclusion: Reducing the procedure led to a 42.7 percent yield, which is about half of what was expected. Also, the sample of alum obtained was slightly less pure than a perfectly pure sample. 2 3...
View Full Document

• Fall '05
• CHIRIK,P
• Chemistry, Aluminium, Alum, alum sample, Actual yield Percent

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern