Sometimes professors will ask us to solve for exact the percentage of each enantiomer in solution. For that we’ll need some new equations.
Concept #1: How to solve for the percentage of each enantiomer.
Example #1: The [α] of pure S-epinephrine is +50°. Calculate the ee of a solution with an observed value of +25°. Calculate percent of each enantiomer. Then sketch the approximate mixture in our sample polarimeter tube.
Practice: The [α] of pure S-epinephrine is +50°. Calculate the ee of a solution with an observed value of -40°. Calculate percent of each enantiomer. Then sketch the approximate mixture in our sample polarimeter tube.