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Unformatted text preview: presence in crude and purified aspirin; therefore, crude and purified aspirin should give no color result. and ferric chloride should give a yelow color. In my experiment, my ferric chloride and salicylic acid mixure was dark purple, crude aspirin result was light purple and purified aspirin result was faint purple color. Since my crude and purified aspirin give light purple color result, it means the presence of phynolic impurity in salicylic acid . Also, it may have a benzene ring and branched alcohol as a by product, which together may cause of faint purple color. That is way, my purified aspirin percent yield from salicylic acid to synthesis aspirin was low and the purified aspirin was faint purple color. Moreover, I have had problem with vaccum filteration which may not have properly filterated the mixures....
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This note was uploaded on 09/08/2010 for the course CHEM 113A at San Jose State University .