Dr. Strangelove has 200.0 mg of the starting material: for an optimal reaction, he requires 1.75 equivalents of borane (MW = 13.83 g/mol, available as a 1.25 M solution) and 5.00 equivalents of hydrogen peroxide (MW = 34.01 g/mol, available as a 30 % (w/w) solution that has a density of 1.11 g/mL). Using the information provided, calculate the volumes of both reagents needed for the transformation. (2 pts)
c) Dr.Strangelove’s optical polarimeter provides unreliable results if the measured angle of rotation is too weak. Assume the reaction only produces the two isomers of the major product drawn in a) (which have a specific rotation [\alpha ] = \pm 31.8\deg ), and that the doctor was able to separate them from any other impurities. If the cell he uses is 25.0 mm in length, and that the volumetric flask used in sample preparation has a volume of 50.00 mL, what is the mass of sample needed to ensure a rotation of at least 1.00\deg if the expected enantiomeric excess is 78.0%? (3 pts)