One of the important lessons of this experiment (and the mp experiment) is that

Question

One of the important lessons of this experiment (and the mp experiment) is that it is often necessary to collect multiple types of data before the identification of an unknown substance can be made with certainty. Consider the real case of Heather who carried out the fractional distillation experiment in 2003. Heather measured the boiling point of her third fraction to be between 97 and 98degreeC. She then took the refractive index and found it to be 1.3900. It was only when she ran the infrared spectrum of her sample (see appendix) and found a characteristic C-O-H stretching band at 1120 cm^-1 that she identified her unknown. What was Heather's high boiling component?

Explanation / Answer

The group is Alcohol.If C=O group is absent then we can observe broad absorption peak near 3400-3300 cm-1 and this is confirmed by the stretching band at 1300-1000 cm-1.(For Alcohols)

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