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Window Help UPAC Aules AAMC Account /Logis Current Ver... to the site MCAT Practice Home GRE CASAA MCATTest ha Acad CAR B:R QUESTION 5 The specific rotation of (S)-2-butanol is +13.5. If 1.00 g of its enantiomer is dissolved in 10 ml of water and the sample is placed in a polarimeter with a length of 1 dm. What would be the rotation you will see? Cannot be determined +13.5 -13.5 Click Save and Submit to save and submit. Ctick Save All Ansavers to save afl ansuers Save All Answers Close Window Save mm 2 1 6

Solution

cell length = l = 1 dm

concentration = mass / volume

                       = 1.00 / 10

                       = 0.1 g / mL

specific rotation = observed rotation / concentration x cell length

13.5 = observed rotation / 0.1 x 1

observed rotation   = 1.35 o

answer :   option A) +1.35