Effect of removal of solvent at temperatures below their normal points with help of rotary evaporator should be determined. Concept introduction: Rotary evaporator is laboratory apparatus that is used to remove solvents with help of reduced pressure. This is designed in such way that allows fast evaporation of solvents. A variable-speed motor is used for rotation of flask that has solvent to be evaporated.

Question

Part 2. A solution of 6.00g of substance B in 100.0mL of aqueous solution is in equilibrium, at room temperature, wl a solution of B in diethyl ether (ethoxyethane) containing 25.0 g of B in 50.0 mL 9) what is the distribution coefficient of substance B b) what is the mass of B extracted by shaking 200 ml of an aqueous solution containing 10g of B with call at room temp): i) 100 mL of diethyl ether ii) 50ml of diethyl ether twice iii) 25ml of diethyl ether four times

Answer 1

Question

Chapter 4.2, Problem 9E

a)

Interpretation Introduction

Interpretation: Effect of removal of solvent at temperatures below their normal points with help of rotary evaporator should be determined.

Concept introduction: Rotary evaporator is laboratory apparatus that is used to remove solvents with help of reduced pressure. This is designed in such way that allows fast evaporation of solvents. A variable-speed motor is used for rotation of flask that has solvent to be evaporated.

b)

Interpretation Introduction

Interpretation: Preference of rotary evaporation distillation over simple distillation should be determined.

Concept introduction: Rotary evaporator is laboratory apparatus that is used to remove solvents with help of reduced pressure. This is designed in such way that allows fast evaporation of solvents. A variable-speed motor is used for rotation of flask that has solvent to be evaporated.

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