Question

A 0.160 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.20° in a 1-dm sample container. The molar mass of the compound is 128.0 g/mol.

(a) What is the specific rotation of D?

(b) What is the observed rotation if this solution is mixed with an equal volume of a solution that is 0.160 M in L, the enantiomer of D?

(c) What is the observed rotation if the solution of D is diluted with an equal volume of solvent?

(d) What is the specific rotation of D after the dilution described in part (c)?

(e) What is the specific rotation of L, the enantiomer of D, after the dilution described in part (c)?

(f) What is the observed rotation of 100 mL of a solution that contains 0.01 mole of D and 0.005 mole of L? (Assume a 1-dm path length.)


I feel like I've been running around in circles with this problem. I keep plugging in the numbers for the rotation formula but I keep getting this wrong. I would rather not have the answers to these problems, but if someone could tell me which equations and formulas I should be plugging in for each problem so I can find the answers on my own, that would be great. Thanks!

Answer 1

Well im a bit late... 6 yrs late but ill be glad to answer this question
A. I spent 7hr on this question so here is the answer
If the wave is 7.13 then the value of decrepit is 9.21 if the value is equal to 99. then the value is money * sin of COVid YES THIS IS 2020