The specific rotation of a pure enantiomer is `+10^(@)`. What will be its observed rotation if its is isolated from a reaction with i. `30%` racemisation and `70%` retention. ii. `70%` racemisation and `30%` inversion.
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To solve the problem, we need to calculate the observed rotation of a mixture based on the specific rotation of a pure enantiomer and the percentages of racemization and retention/inversion.
### Step-by-Step Solution:
**Given:**
- Specific rotation of pure enantiomer, \(\alpha_{pure} = +10^\circ\)
- For the first case: 30% racemization and 70% retention
- For the second case: 70% racemization and 30% inversion
...
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