Difference between revisions of "Chem341:Recrystallization experiment"
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| − | + | Please record data (%recovery, MP) below for the recrystallization experiment. If students report that they had a lot of oil, and they had to decant their solution into another flask (this happened a lot with the Tuesday section), don't include those data here. Instead, just record the data on a piece of paper so we can look at them separately. | |
First you will need to create an account, as described '''[[Help:Creating_an_account|here]]'''. To edit ''this'' page, click on the "edit" tab, make the necessary changes, then click "Save page". If you want to check that your edits are right before you save, then click "Preview" instead (I usually do this). | First you will need to create an account, as described '''[[Help:Creating_an_account|here]]'''. To edit ''this'' page, click on the "edit" tab, make the necessary changes, then click "Save page". If you want to check that your edits are right before you save, then click "Preview" instead (I usually do this). | ||
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|112-115.5 | |112-115.5 | ||
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| − | | | + | |70.36 |
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| + | |103.5-106.0 | ||
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| + | |72.1 | ||
| + | |99.5-103 | ||
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| + | |78.94 | ||
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Latest revision as of 20:41, 10 December 2009
Please record data (%recovery, MP) below for the recrystallization experiment. If students report that they had a lot of oil, and they had to decant their solution into another flask (this happened a lot with the Tuesday section), don't include those data here. Instead, just record the data on a piece of paper so we can look at them separately.
First you will need to create an account, as described here. To edit this page, click on the "edit" tab, make the necessary changes, then click "Save page". If you want to check that your edits are right before you save, then click "Preview" instead (I usually do this).
When adding data to the table, the |- symbol indicates a new line of data, then the data are entered after the | symbols (first %recovery, then MP). On the first line I have put in some example data - 77%, and a MP of 113-114 °C for acetanilide (other compounds have a different MP).
Acetanilide
Table 1: Acetanilide results % Recovery MP 97.451 112-115.5 54.9 113-115 50.7 106-112 83 114-115 68.24 109-111 293.53 111-114 .1023 100-114 73.03 93-98 65.71 98-101 71 113-115 48.5 104-106 72.3 112.5-116.5 62.6 107-111 70.36 112-116 53.14 90-96 92-98
Salicylic acid
Table 2: Salicylic acid results % Recovery MP 82.9 150-155 106.7 158-161 98.1 160-162 157-159 82.0 158.5-160.5 108.91 160-161 70.23 160-162 101.34 149-155 84.6 159-161 53.0 155-161 50.8 160-161 73.04 157-161 81.3 155-157 99.5 158-161 64.4 157-158
m-Anisic acid
Table 3: m-Anisic acid results % Recovery MP 81.9 102-104 66.6 102-104 58.0 101-103 65.7 102.5-104.8 97.09 104-105 72.1 104-106 67.98 103.5-106.0 72.1 99.5-103 78.94 104-105 69.5 98-101
