dehydration of cyclohexanol

Question 1

what does a dehydration reaction indicate

Answer 1

a loss of water

Question 2

what is an azeotrope (azeotropic mixture)

Answer 2

two compounds that have different boiling points, but have a different boiling point alltogether when they are mixed

Question 3

how are azeotropic properties used in distillation

Answer 3

the solvent added will create two ezeotropic mixtures with the two compound present in the original sample. Each of the new azeotropes will boil at different temperatures.

Question 4

describe the bromine test

Answer 4

bromine reagent will react with alkenes and alkynes if they are present. if this occurs, the brown color will quickly dissipate (positive test)

Question 5

what could produce a false positive bromine test

Answer 5

the bromine reagent could either react with compounds other than the desired compound. the alkene could also be unreactive (orange brown coloring persists)

Question 6

describe the permangenate test (Baeyer’s Test)

Answer 6

• potassium permanganate reagent is purple in color
• if alkenes or alkynes react with the reagent, the color will dissipate and a brown precipitate will form
• if negative purple color persists

Question 7

is the permanganate test or the bromine test more accurate? why?

Answer 7

the permanganate test is more accurate
potassium permanganate reacts with alkenes that are not reactive with bromine making it more accurate

Question 8

what is most likely to cause a false positive Baeyer’s Test

Answer 8

potassium permangenate reagent reacts with easily oxidizable functional groups