Let `(+)` tartaric acid has a specific rotation of`+11.1`, Calculate the specific rotation of a mixture of `68%(+)` tartaric acid and `32%(-)` tartaric acid.

Answer

4

Explanation

Enantiomeric excess `=(d-l)/(d+l)xx100=(68-32)/(68+32)xx100=36%`
`:.` Optical rotation of this mixture `=36%xx + (11.1^(0))=4`