Post-lab questions ( 60 points, 4 points cach): Part 1 1. Which of the following is NOT an important step in recrystallization. a. cooling the hot solvent slowly to precipitate the crystals b. dissolving the substance in a solvent at elevated temperatures c. filtering the HOT solution to remove insoluble impurities. d. using a large excess of solvent. 2. Recrystallization is NOT meant to: a. remove all impurities - soluble or insoluble b. purify solid compounds c. purify liquids d. separate insoluble impurities only 3. A GOOD recrystallizing solvent...: a. should be easy to remove from the product crystals. b. should NOT dissolve the product at high temperatures. c. should dissolve the product at low temperatures. 4. What is NOT the correct procedure after the crystals are collected? a. they are pressed down on to the filter pad. b. they are washed with cold, fresh solvent. c. they are washed with hot, fresh solvent. 5. Which is NOT useful when inducing crystallization? a. cooling RAPIDL.Y to a very low temperature. b. adding seed crystals c. cooling slowly 6. Which of the following is preferable to obtain a pure, erystalline producr? a. washing with several portions of fresh, hot solvent. b. Washing with several portions of fresh, cold solvent. c. washing with the mother liquor