THIS IS A FINAL EXAM. PLEASE DO NOT ANSWER UNLESS YOU ARE 100% NECCESSARY. A stu
ID: 488460 • Letter: T
Question
THIS IS A FINAL EXAM. PLEASE DO NOT ANSWER UNLESS YOU ARE 100% NECCESSARY.
A student was given a white solid for an unkown. Its melting point range was 119-121 degrees celcius. The student has previously worked with benzoic acid, and had observed that it was a white crystalline solid with a melting point of 122 degrees celcius.
A. Can the student conclude that the unknown is benzoic acid on the basis of her work to this? Why or why not?
B. What additional experimental work should be done to verify this compound?
Explanation / Answer
a) No, it is not necessary that the white crystalline solid with a melting point of 122 degrees celcius is benzoic acid because there are other crystalline solids with a melting point in that range.
b)
The student cannot conclude that the unknown is benzoic acid on the basis of her work to this to confirmed need some other tests likes:
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