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Close Window Moving to the next question prevents changes to this answer. Question S of Question 5 10 points Save Answer A student has a sample of salicylic acid (mp 158.6 C) and an unknown compound with the same melting point If the unknown is NOT salicylic acid, what will the student observe if he mixes a small portion of the two samples and takes the melting point again? (Select all that apply.) A The melting point will remain unchanged B. The melting point range will be broader CThe miture will melt at a lower temperature D. The mixture melts at a higher temperature E. No fixed melting point can be observed Question S of Moving to the next question prevents changes to this answer

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Answer-

A student has a sample of salicylic acid having melting point 158.6 oC and a unknown compound with same melting point but the unknown is not salicylic acid. After mixing these two compounds having same melting point...then correct options are-

(B) The melting point range will be broader and

(C) The mixture will melt at a lower temperature are appropriate options

Reason-

Salicylic acid + unknown compound -------> Mixture

In the above case unknown compound will act as impurity for the salicylic acid or might be its vice versa. But yes mixing phenomenon slightly distrub the internal structure

As a result, in most of times its melting point depressed i.e.lower melting temperature than the pure compound one and It may also melt over a wide range of temperatures (melting point depression phenomenon)

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