Suppose a reaction mixture, when diluted with water, afforded 300 mL of an aqueous solution of 30 g of the reaction product malononitrile [CH2(CN)2], which is to be isolated by extraction with ether. The solubility of malononitrile in ether at room temperature is 20.0 g/100 mL, and in water is 13.3 g/100 mL. What weight of malononitrile would be recovered by extraction with (a) three 100-mL portions of ether and (b) one 300-mL portion of ether

Question

24-06-2020
Chemistry

contestada

Suppose a reaction mixture, when diluted with water, afforded 300 mL of an aqueous solution of 30 g of the reaction product malononitrile [CH2(CN)2], which is to be isolated by extraction with ether. The solubility of malononitrile in ether at room temperature is 20.0 g/100 mL, and in water is 13.3 g/100 mL. What weight of malononitrile would be recovered by extraction with (a) three 100-mL portions of ether and (b) one 300-mL portion of ether

Respuesta :

Otras preguntas

Laura retired from her job recently, and she has saved about $493,133.00 over the course of her career. She plans to withdraw $1,695.00 each month to pay for li

Which is a characteristic of language in oder adults? Question 32 options: Tip of the tongue phenomenon Difficulty understanding affective prosody Forgett

Solve the equation using factoring or the quadratic formula, whichever is appropriate. Make sure to simplify your answers. 0.01y2−0.02y−0.04=0

How much ice (at 0°C) must be added to 1.75 kg of water at 77 °C so as to end up with all liquid at 26 °C? (ci = 2000 J/(kg.°C), cw = 4186 J/(kg.°C), Lf= 3.35 ×

Which of the following is a power held only by members of the Senate? A.) The ability to override a veto B.) The ability to filibuster C.) The ability to impeac

Joan decide to look at new and used trucks. He found a used truck for $11000. A new Truck for 23000,so what percent of the price of a new truck does Joan pay f

Danny's Bike Shop sells a certain model of racing bike for $550. The same bike can be bought at a competing shop for 7 percent less. How much does the bike cost

i just wanna be happy and i dont know how right now drugs only last so long that numb feeling only last so long the couple seconds of nothing in life matters on

Please Help!!!!!!!!!! Only the correct answer!!!!!!!Danielle bought a fountain online. It cost $531 plus 25.1% shipping and handling. What was the total cost?Ro

5) James and Andrew are considering adding some premium channels to their satellite package. The cost of their total bill if they added 1 and 4 premium channels

Larus Larus · Answer 1 · 2020-06-27T06:14:27+02:00

The given question is not complete, the complete question is:

Suppose a reaction mixture, when diluted with water, afforded 300 mL of an aqueous solution of 30 g of the reaction product malononitrile [CH2(CN)2], which is to be isolated by extraction with ether. The solubility of malononitrile in ether at room temperature is 20.0 g/100 mL, and in water is 13.3 g/100mL. The ratio of these quantities is equal to the partition coefficient, k, which equals What weight of malononitrile would be recovered by extraction of (a) three 100-mL portions of ether and (b) one 300-mL portion of ether? SHOW WORK (Can be written in pen and attached to report). Suggestion: For each extraction, let x equal the weight extracted into the ether layer. In part (a), for the first of the three extractions, the concentration of malononitrile in the ether layer is x/100 and in the water layer is (30-x)/100.

Answer:

The correct answer is 10 grams and 18 grams.

Explanation:

Based on the given question, 20 gram per 100 ml is the solubility of malononitrile in ether, and 13.3 gram per 100 ml is the solubility of malononitrile in water.

Thus, the ration of the solubility is,

Solubility in water/solubility in ether = 20/13.3 = 1.50

a) Let w be the weight of malononitrile extracted into water in every extraction. Then the concentration of the ether layer will be w/100. The concentration in the water layer will be 30-w/300. Now the ratio will be,

Ratio = w/100 / (30-w)/300

1.50 = w/100 * 300 (30-w)

w = 10

Hence, the weight of malononitrile recovered by extraction is 10 grams.

b) The concentration in the ether layer will be w/300. The concentration in the water layer will be (30-w) / 300. Now the ratio will be,

Ratio = w/300 / (30-w) / 300

1.50 = w/300 * 300 (30-w)

w = 18

Hence, 18 grams is the weight of malononitrile recovered by extraction.