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cloveb cloveb
wrote...
Valued Member
Posts: 776
2 months ago
Discuss the purity of each of the recovered compounds (are they pure? how do you know?) 
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wrote...
Staff Member
2 months ago
Physical properties of a chemical compounds are one of the best techniques that used to determine if the compound is pure or impure. Otherwise, pure compounds can be identifying by their physical properties such us boiling point, solubility, density and melting point. However, melting point is one of the important methods that used in this organic lab in order to determine the purity of a chemical compounds. Thus, in this experiments the melting point of the two organic compounds (3-nitroaniline is 114° C and benzoic acid is 122.41°C) were obtained from the CRC Handbook of Chemistry and Physics had a sharp melting point range. After, measuring experimentally the melting point of 3-nitroaniline  and benzoic acid using Fisher-Johns Melting Point Apparatus, the melting range were ( 110° C -118° C) and (119°C -123°C ) respectively which  indicate that the compounds are pure because pure compounds have sharp melting range which means melt with a range of 2 or less.
 
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