Question
why isnt the benzoic acid answer?꙼̈
melting points of Benzoic acid and Phenyl succinate are both 121 celsius in the chart. can you please explain?꙼̈
1. An unknown compound X is one of the four compounds listed in the following table. A mixture of X with benzoic acid melts a
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Answer #1

Compound X is phenyl succinate.

Because melting point of compound decreases as impurities (or another compound) was added in it. When Compound X is mixed with Benzoic acid then mixture melt at 89°C which is lower than 121 °C (original melting point) hence X is not Benzoic acid. When X is mixed with phenyl succinate then melting point of mixture is 120°C which is almost similar to 121°C hence Compound X is phenyl succinate.

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