A student is given two alcohols with which to perform Lucas' Test. These are cyclohexanol and 2-methyl-2-propanol. The bottles containing each alcohol are labelled, but the propettes used are not. The student accidentally muddles the propettes. When drops of each alcohol are mixed with Lucas' Reagent and kept at 270 C, both solutions become turbid. How can the student find out which alcohol has been placed in which propette?