Table 1 lists 33 pure compounds, several of which you will select to mix with each of your unknowns, so that you can determine the melting points of the mixtures, and thus the identity of the unknowns. Table 1. Known Compounds for Melting Point Experiment COMPOUND mp range (oC) COMPOUND mp range (oC) 1) 1,4-dimethoxybenzene 54-56 21) 4-nitroaniline 146-149 2) 2-phenylphenol 57-59 22) 1-napthoic acid 158-160 3) diphenylacetylene 59-61 23) salicylic acid 159-161 4) 2,4,6-trichlorophenol 64-66 24) triphenylmethanol 160-162 5) biphenyl 68-70 25) sulfanilamide 165-167 6) methyl 3-nitrobenzoate 78-80 26) 4-bromoacetanilide 165-169 7) naphthalene 80-82 27) itaconic acid 165-168 8) vanillin 81-83 28) d-mannitol 166-168 9) acetamide 79-81 29) acetaminophen 168-172 10) phenoxyacetic acid 98-100 30) succinic acid 184-186 11) resorcinol 109-112 31) hippuric acid 187-191 12) 3-toluic acid 111-113 32) 4-terphenyl 212-213 13) acetanilide 113-115 33) anthracene 210-215 14) 4-hydroxybenzaldehyde 112-116 15) (+/-)-mandelic acid 119-121 16) benzoic acid 122 17) 2-naphthol 120-122 18) 2-benzoylbenzoic acid 126-129 19) trans-cinnamic acid 132-135 20) urea 132-135 1) record the names and melting point values of all the candidate compounds from Table 1 that fall into the same melting ranges of each of the unknowns.
Table 1 lists 33 pure compounds, several of which you will select to mix with each of your unknowns, so that you can determine the melting points of the mixtures, and thus the identity of the unknowns.
Table 1. Known Compounds for Melting Point Experiment
|
|
COMPOUND |
mp range (oC) |
|
COMPOUND |
mp range (oC) |
|
1) |
1,4-dimethoxybenzene |
54-56 |
21) |
4-nitroaniline |
146-149 |
|
2) |
2-phenylphenol |
57-59 |
22) |
1-napthoic acid |
158-160 |
|
3) |
diphenylacetylene |
59-61 |
23) |
salicylic acid |
159-161 |
|
4) |
2,4,6-trichlorophenol |
64-66 |
24) |
triphenylmethanol |
160-162 |
|
5) |
biphenyl |
68-70 |
25) |
sulfanilamide |
165-167 |
|
6) |
methyl 3-nitrobenzoate |
78-80 |
26) |
4-bromoacetanilide |
165-169 |
|
7) |
naphthalene |
80-82 |
27) |
itaconic acid |
165-168 |
|
8) |
vanillin |
81-83 |
28) |
d-mannitol |
166-168 |
|
9) |
acetamide |
79-81 |
29) |
acetaminophen |
168-172 |
|
10) |
phenoxyacetic acid |
98-100 |
30) |
succinic acid |
184-186 |
|
11) |
resorcinol |
109-112 |
31) |
hippuric acid |
187-191 |
|
12) |
3-toluic acid |
111-113 |
32) |
4-terphenyl |
212-213 |
|
13) |
acetanilide |
113-115 |
33) |
anthracene |
210-215 |
|
14) |
4-hydroxybenzaldehyde |
112-116 |
|
|
|
|
15) |
(+/-)-mandelic acid |
119-121 |
|
|
|
|
16) |
benzoic acid |
122 |
|
|
|
|
17) |
2-naphthol |
120-122 |
|
|
|
|
18) |
2-benzoylbenzoic acid |
126-129 |
|
|
|
|
19) |
trans-cinnamic acid |
132-135 |
|
|
|
|
20) |
urea |
132-135 |
|
|
|
1) record the names and melting point values of all the candidate compounds from Table 1 that fall into the same melting ranges of each of the unknowns.
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