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The column was packed with 12 g of alumina. A 50:50 mixture of ferrocene and acetylferrocene was weighed on the electronic balance (total mass = 0.102 g, or 102 mg), and placed at the top of the column. Elution was first with hexane, which caused a yellow band to move down the white alumina. After the yellow fraction was collected, the eluent was replaced by TBME, which was passed through the column until the red fraction was collected. The two colored solutions were heated in a 70 °C water bath until the solvents were evaporated and colored solids were obtained. Percent recoveries for each compound were calculated, and melting points were taken. Data for the first, fastest-moving fraction: 0.045 g yellow solid, mp = 170-171 °C. Data for the second, slowest-moving fraction: 0.054 g orange solid, mp= 75-80 °C.

The column was packed with 12 g of alumina. A 50:50 mixture of ferrocene and acetylferrocene was weighed on the electronic balance (total mass = 0.102 g, or 102 mg), and placed at the top of the column. Elution was first with hexane, which caused a yellow band to move down the white alumina. After the yellow fraction was collected, the eluent was replaced by TBME, which was passed through the column until the red fraction was collected. The two colored solutions were heated in a 70 °C water bath until the solvents were evaporated and colored solids were obtained. Percent recoveries for each compound were calculated, and melting points were taken. Data for the first, fastest-moving fraction: 0.045 g yellow solid, mp = 170-171 °C. Data for the second, slowest-moving fraction: 0.054 g orange solid, mp= 75-80 °C.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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calculate for percent recovery, and explain what does 50:50 mixture means?  since total mass is 0.102 g, does it means 0.051 for ferrocene, and another 0.051 for acetyferrocene. I feel confused.

**The Experiment:** The column was packed with 12 g of alumina. A 50:50 mixture of ferrocene and acetylferrocene was weighed on the electronic balance (total mass = 0.102 g, or 102 mg), and placed at the top of the column. The elution process began with hexane, which caused a yellow band to move down the white alumina. Once the yellow fraction was collected, TBME (tert-butyl methyl ether) was used as the eluent, passing through the column until the red fraction was collected. The two colored solutions were heated in a 70 °C water bath until the solvents evaporated, yielding colored solids. Percent recoveries for each compound were calculated, and melting points were measured. **Data for the first, fastest-moving fraction:** - 0.045 g yellow solid, melting point = 170-171 °C. **Data for the second, slowest-moving fraction:** - 0.054 g orange solid, melting point = 75-80 °C.
Transcribed Image Text:**The Experiment:** The column was packed with 12 g of alumina. A 50:50 mixture of ferrocene and acetylferrocene was weighed on the electronic balance (total mass = 0.102 g, or 102 mg), and placed at the top of the column. The elution process began with hexane, which caused a yellow band to move down the white alumina. Once the yellow fraction was collected, TBME (tert-butyl methyl ether) was used as the eluent, passing through the column until the red fraction was collected. The two colored solutions were heated in a 70 °C water bath until the solvents evaporated, yielding colored solids. Percent recoveries for each compound were calculated, and melting points were measured. **Data for the first, fastest-moving fraction:** - 0.045 g yellow solid, melting point = 170-171 °C. **Data for the second, slowest-moving fraction:** - 0.054 g orange solid, melting point = 75-80 °C.
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