A student dissolved 30 mg of a crude unknown in 2 ml of 95% ethanol at room temperature. After chilling in an ice bath and washing crystal with small amount of ice-cold ethanol, she recovered 5mg. Why was the recovery so low?
2 answers
1) solubility in cold ethanol is higher than expected.
A. Too soluble in ethanol.
B. The sample was VERY crude (not much of the compound to start with).
B. The sample was VERY crude (not much of the compound to start with).