If you started with 5.00 g of a crude mixture and ended up with 4.25 g of solid after recrystallization, what is the percent recovery?

To calculate the percent recovery from the recrystallization process, you use the formula:

[ \text{Percent Recovery} = \left( \frac{\text{mass of recovered solid}}{\text{initial mass of mixture}} \right) \times 100 ]

In this scenario, the initial mass of the crude mixture is 5.00 g, and the mass of solid obtained after recrystallization is 4.25 g. Plugging these values into the formula gives:

[ \text{Percent Recovery} = \left( \frac{4.25 , \text{g}}{5.00 , \text{g}} \right) \times 100 = 85.0% ]

This calculation shows that 85.0% of the original crude mixture was recovered as solid after recrystallization. This recovery percentage is indicative of how effective the recrystallization process was in purifying the desired product while minimizing losses.

In laboratory procedures, a percent recovery of around 85% is generally considered good, as some loss of material during recrystallization is expected due to factors like solubility and mechanical loss during transfer or filtration. The other options represent common recovery