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(+) mandelic acid has a specific rotation of 158°. What would be the observed specific rotation of a mixture of 25percent (-) mandelic acid and 75percent (+) mandelic acid?

Aditya kulkarni , 8 Years ago
Grade 11
anser 1 Answers
Anjana kamal

Last Activity: 7 Years ago

Positive mandelic acid has a specific rotation of +158° so negative mandelic acid will have -158°.The observed specific rotation will be:[75/100]× (-158) + [ 25/100]× (-158)= +79°

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