$(+)$ -Tartaric acid has a specific rotation of $+12.0^{\circ} .$ Calculate the specific rotation of a mixture of $68 \%(+)$ -tartaric acid and $32 \%(-)$ -tartaric acid
Added by Steven G.
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Step 1: Calculate the specific rotation of the mixture using the formula: \[ \text{Specific rotation of mixture} = \left( \frac{\% (+) \times \text{Specific rotation of (+)} + \% (-) \times \text{Specific rotation of (-)}}{100} \right) \] Show more…
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7. (+)- Tartaric acid has a specific rotation (literature value) of +12.0°. a) If a sample of tartaric acid was analyzed and had an experimental specific rotation of 8.16°, use this data to calculate the %ee of the sample. b) What is the actual percentage of (R)-(+)-tartaric acid and (S)-(-)- tartaric acid in the sample?
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