Predict the structure of ieodomycin D, an antimicrobial from marine Bacillus, produced by electrocyclic ring opening. oH ܨ OH A ܘ iedomycin D

Explain with detail some factors which must be considered when choosing a solvent to dissolve a solid powder.

Pb(NO3)2 is placed in water. Please predict the physical state using our solubility rules from class. Select one: a. aqueous - (aq) b. liquid - (l) c. gas - (g) d. solid - (s) e. plasma - (p)

mixing instead of vigorously shaking them will help prevent emulsions from forming in the first place. 1. Questions 1. You are given a substance that is equally soluble in water and hexane (two immiscible solvents). a) What is K? b) If you start with 10 g of the substance dissolved in 100 mL of water and are given 100 mL of hexane to extract with, algebraically show that it is better to do two smaller extractions using 50 mL of hexane for each extraction than it is to do one extraction using 100 mL o hexane. 2. You have a solution that contains 4.0 g of oxalic acid dissolved in 100 mL of water. This solution is placed in a separatory funnel, and then 100 mL of diethyl ether is added to the separatory funnel and an extraction is performed. (Diethyl ether and water are immiscible solvents.) Use the following constants to calculate how much oxalic acid is in each solvent after the extraction. Solubility of oxalic acid in water = 9.5 g / 100 mL Solubility of oxalic acid in ether = 16.9 g /…