removed from water using benzene(C6H6) as the extraction solvent. Benzene and water are immiscible. When an aqueous solution of acid is thoroughly mixed with pure benzene and allowed to settle, two layers of liquid are formed. The benzene layer contains 90% benzene and 10% citric acid; the water layer contains 1 % benzene, 0.5% acid and the rest water. a. Calculate the weight of the benzene used in this operation. b. Calculate the weight of the benzene layer.

removed from water using benzene(C6H6) as the extraction solvent. Benzene and water are immiscible. When an aqueous solution of acid is thoroughly mixed with pure benzene and allowed to settle, two layers of liquid are formed. The benzene layer contains 90% benzene and 10% citric acid; the water layer contains 1 % benzene, 0.5% acid and the rest water. a. Calculate the weight of the benzene used in this operation. b. Calculate the weight of the benzene layer.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter7: Molecular Structures

Section: Chapter Questions

Problem 88QRT

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Oral rehydration salts are stated to contain the following components: Sodium Chloride 3.5g Potassium Chloride 1.5g Sodium Citrate 2.9g Anhydrous Glucose 20.0g 8.342 g of oral rehydration salts are dissolved in 500 ml of water. 5 ml of the solution is diluted to 100 ml and then 5 ml is taken from the diluted sample and is diluted to 100 ml. The sodium content of the sample is then determined by flame photometry. The sodium salts used to prepare the mixture were: Trisodium citrate hydrate (C6H5Na3O7, 2H2O) MW 294.1 and sodium chloride (NaCl) NW 58.5. Atomic weight of Na = 23. The content of Na in the diluted sample was determined to be 0.3210 mg/100 ml. Determine the % of stated content of Na in the sample.
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