The solubility of solute A is 0.72 g in 100 g of an organic solvent and 0.37 f p
ID: 1069172 • Letter: T
Question
The solubility of solute A is 0.72 g in 100 g of an organic solvent and 0.37 f per 100 g of water. Calculate K_d in the ratio in terms of organic layer to water layer. An aqueous solution contains 100 mL of solute A is 20 mL of water. Calculate the mass of solute A extracted by 20 mL of the organic solvent. If successive extractions are done with two 10-, L of the organic solvent, what is the total mass extracted? The stopper must be removed from a separately funnel so that liquid can be drained out through the stopcock. Why? If two immiscible solvents have a close density is it possible to do extraction ans why? Benzoic acid (100 mg), dichloromethane (60 mL)m CaCI_2 pellets, boiling chip. 125-mL separately funnel, 50-mL conical flasks (3), 14 times 2-cm test tube, 15 times 1-cm test tubes hotplates (4, for a class)Explanation / Answer
2) The stopper should always be removed from a separatory funnel whenever a liquid is being drained through a stopcock because of the vacuum being generated at the place voided by displaced liquid .If the stopper is not removed, the air would not be able to enter the void space and a vacuum will be created which will prevent the flow of the liquid from the stopcock.
3) If the density of two immiscible solvent is close, they can be separated. The distribution law states that if a substance is added to a system of two liquid layers, made up of two immiscible components, then the substance will distribute itself between the two layers so that the ratio of the concentration in one solvent to the concentration in the second solvent remains constant at constant temperature. At equilibrium, the partition coefficient is described by the mathematical expression
K = concentration in solvent A / concentration in solvent