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.
+
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.
  
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The <nowiki>|-</nowiki> symbol indicates a new line of data, then the data are entered after the <nowiki>|</nowiki> symbols (first %recovery, then MP).  On the first line I have put in some example data - 77%, and a MP of 113-114 &deg;C for acetanilide (other compounds have a different MP).
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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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When adding data to the table, the <nowiki>|-</nowiki> symbol indicates a new line of data, then the data are entered after the <nowiki>|</nowiki> symbols (first %recovery, then MP).  On the first line I have put in some example data - 77%, and a MP of 113-114 &deg;C for acetanilide (other compounds have a different MP).
  
 
==Acetanilide==
 
==Acetanilide==
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! % Recovery !! MP
 
! % Recovery !! MP
 
|-
 
|-
−
| 77
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|97.451
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| 113-114
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|112-115.5
 
|-
 
|-
−
|
+
|54.9
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|
+
|113-115
 
|-
 
|-
−
|
+
|50.7
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|
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|106-112
 
|-
 
|-
−
|
+
|83
−
|
+
|114-115
 
|-
 
|-
−
|
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|68.24
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|109-111
 
|-
 
|-
−
|
+
|293.53
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|
+
|111-114
 
|-
 
|-
−
|
+
|.1023
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|
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|100-114
 
|-
 
|-
−
|
+
|73.03
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|
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|93-98
 
|-
 
|-
−
|
+
|65.71
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|
+
|98-101
 
|-
 
|-
−
|
+
|71
−
|
+
|113-115
 
|-
 
|-
−
|
+
|48.5
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|
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|104-106
 
|-
 
|-
−
|
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|72.3
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|112.5-116.5
 
|-
 
|-
−
|
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|62.6
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|
+
|107-111
 
|-
 
|-
−
|
+
|70.36
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|112-116
 
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|-
−
|
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|53.14
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|90-96
 
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|92-98
 
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|
 
|
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|
 
|
 
|
 
|
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|}
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==Salicylic acid==
 +
 +
:{| class="wikitable sortable"
 +
|+'''Table 2: Salicylic acid results'''
 
|-
 
|-
−
|
+
! % Recovery !! MP
−
|
 
 
|-
 
|-
−
|
+
|82.9
−
|
+
|150-155
 
|-
 
|-
−
|
+
|106.7
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|
+
|158-161
 
|-
 
|-
−
|
+
|98.1
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|
+
|160-162
 
|-
 
|-
 
|
 
|
−
|
+
|157-159
 
|-
 
|-
−
|
+
|82.0
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|
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|158.5-160.5
 
|-
 
|-
−
|
+
|108.91
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|
+
|160-161
 
|-
 
|-
−
|
+
|70.23
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|
+
|160-162
 
|-
 
|-
−
|
+
|101.34
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|
+
|149-155
 
|-
 
|-
−
|
+
|84.6
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|
+
|159-161
 
|-
 
|-
−
|
+
|53.0
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|
+
|155-161
 
|-
 
|-
−
|
+
|50.8
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|
+
|160-161
 
|-
 
|-
−
|
+
|73.04
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|
+
|157-161
 
|-
 
|-
−
|
+
|81.3
−
|
+
|155-157
 
|-
 
|-
−
|
+
||99.5
−
|
+
|158-161
−
|}
 
−
 
 
−
==Salicylic acid==
 
−
 
 
−
:{| class="wikitable sortable"
 
−
|+'''Table 2: Salicylic acid results'''
 
 
|-
 
|-
−
! % Recovery !! MP
+
|64.4
−
|-
+
|157-158
−
| 77
 
−
| 157-159
 
−
|-
 
−
|
 
−
|
 
−
|-
 
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|
 
−
|
 
−
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! % Recovery !! MP  
 
! % Recovery !! MP  
 
|-
 
|-
−
| 77
+
|81.9
−
| 101-103
+
|102-104
 +
|-
 +
|66.6
 +
|102-104
 +
|-
 +
|58.0
 +
|101-103
 +
|-
 +
|65.7
 +
|102.5-104.8
 
|-
 
|-
−
|
+
|97.09
−
|
+
|104-105
 
|-
 
|-
−
|
+
|72.1
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|
+
|104-106
 
|-
 
|-
−
|
+
|67.98
−
|
+
|103.5-106.0
 
|-
 
|-
−
|
+
|72.1
−
|
+
|99.5-103
 
|-
 
|-
−
|
+
|78.94
−
|
+
|104-105
 
|-
 
|-
−
|
+
|69.5
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+
|98-101
 
|-
 
|-
 
|
 
|

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
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