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1. To determine the identity of an unknown by its melting point.
2. To confirm the identity of an unknown by using the mixed melting point technique.
MATERIALS
8 Known chemicals with literature melting points.
Name of Known Lit. M.P. Name of Known Lit. M.P
Adipic Acid 151?c - 153?c Resorcinol 109?c - 110?c
Citric Acid 152?c - 153?c Toluic Acid 110?c - 112?c
Naphthalene 80?c Phenyl acetic Acid 77?c - 78?c
Phenacetin 134?c-135?c Urea 133?c - 134?c
EQUIPMENT & APPARATUS
Meltemp Apparatus: Heating block used to melt chemicals at unknown temperatures... displayed 300 characters
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1. To determine the identity of an unknown by its melting point.
2. To confirm the identity of an unknown by using the mixed melting point technique.
MATERIALS
8 Known chemicals with literature melting points.
Name of Known Lit. M.P. Name of Known Lit. M.P
Adipic Acid 151?c - 153?c Resorcinol 109?c - 110?c
Citric Acid 152?c - 153?c Toluic Acid 110?c - 112?c
Naphthalene 80?c Phenyl acetic Acid 77?c - 78?c
Phenacetin 134?c-135?c Urea 133?c - 134?c
EQUIPMENT & APPARATUS
Meltemp Apparatus: Heating block used to melt chemicals at unknown temperatures... displayed next 300 characters
The only one given pure compounds with similar melting ranges was benzil (94~95 ?¬C). The mixture of the unknown and benzil produced a mixture that melted at 95~97 ?¬C...
The melting point range of my sample of aspirin was 125.1 degrees Celcius to 131.3 degrees Celcius (melting point). The literature value of the melting point is 135 to 135...
To carry out the Diels-Alder reaction 1.00g of eucalyptus oil was dissolved with a 2.00ml ethyl ether. Assuming that 50% of the mass of the eucalyptus oil was the unknown diene, the mass of maleic anhydride needed to react with ...
1. To determine the identity of an unknown by its melting point.
2. To confirm the identity of an unknown by using the mixed melting point technique.
MATERIALS
8 Known chemicals with literature melting points...
The mixture melting point is useful in confirming the identity of an unknown by mixing with known compound whose melting point is known because the melting point of the mixture tends to be almost the same temperature as the melting point of the known if they are the same substances...
This means that in our 1.007g sample of unknown compound A, .480g of impurities were present. During this part of the experiment, the only procedure that did not go according to plan was the amount of hot solvent we added to our compound to dissolve it completely...
During the first trial the temperature was climbing quickly and the Biphenyl melted quickly. During the next two trials the Mel-temp was set at a lower setting and our melting point was closer to the known melting point...
