Essay About C Resorcinol And Citric Acid

Melting Point Determination
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OBJECTIVES
To determine the identity of an unknown by its melting point.
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 151ÐÑ”c – 153ÐÑ”c Resorcinol 109ÐÑ”c – 110ÐÑ”c
Citric Acid 152ÐÑ”c – 153ÐÑ”c Toluic Acid 110ÐÑ”c – 112ÐÑ”c
Naphthalene 80ÐÑ”c Phenyl acetic Acid 77ÐÑ”c – 78ÐÑ”c
Phenacetin 134ÐÑ”c-135ÐÑ”c Urea 133ÐÑ”c – 134ÐÑ”c
EQUIPMENT & APPARATUS
Meltemp Apparatus: Heating block used to melt chemicals at unknown temperatures.
Capillary tubes: Tubes used to hold chemicals to be melted.
Thermometer: Used to determine the temperature at which chemicals melt.
Watch glass: Used to hold chemicals and for transfer of chemicals into capillary tubes.
Hollow glass: Used to contain capillary tubes and to help pack the chemicals into the tube.