1. Which of the principal diagrams ( BPD, FPD, P&ID ) should be used to do the following: a. Determine the number of trays is a distillation column? b. Determine the top and bottom temperatures in a distillation column? c. Validate the overall material balance for a process? d. Check the instrumentation for a given piece of equipment in a "pre-start-up" review? e. Determine the overall material balance for a whole chemical plant?

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices