In this experiment, 0.100 g of caffeine is dissolved in 4.0 mL of water. The caffeine...

In this experiment, 0.100 g of caffeine is dissolved in 4.0 mL of water. The caffeine is extracted from the aqueous solution three times with 2.0-mL portions of methylene chloride. Calculate the total amount of caffeine that can be extracted into the three portions of methylene chloride. Caffeine has a distribution coefficient of 4.6, between methylene chloride and water.

Expert Solution

queen_honey_blossom answered 2 years ago

In this experiment, 0.170 g of caffeine is dissolved in 10.0 mL of water. The caffeine...

In this experiment, 0.170 g of caffeine is dissolved in 10.0 mL of water. The caffeine is extracted from the aqueous solution three times with 5.0-mL portions of methylene chloride. Calculate the total amount of caffeine that can be extracted into the three portions of methylene chloride. Caffeine has a distribution coefficient of 4.6 between methylene chloride and water.

1. Assume that the solubility of caffeine in water is 4.0 g/100 mL and in methylene...

1. Assume that the solubility of caffeine in water is 4.0 g/100 mL and in methylene chloride it is 16.0 g/100 mL at 25°C. What is KD for this system? 3. Once you calculate KD, calculate how much caffeine would be extracted by mixing 1.0 g of caffeine in 100 mL of water and performing three consecutive extractions with 25 mL CH2Cl2 each time. Show your work. 2. Assume you changed the solvent to ethyl acetate which has a KD...

1.13 g caffeine was dissolved in 60 mL water. The solution was extracted with 3 portions...

1.13 g caffeine was dissolved in 60 mL water. The solution was extracted with 3 portions of 20 mL methylene chloride. How much caffeine is left in the water after the extractions? Show your work. The solubility of caffeine in water is 2.26 g/100 mL at 25 degrees C. The solubility of caffeine in methylene chloride is 8.42 g/100 mL at 25 degrees C.

0.20 g of caffeine dissolves in 10 mL of room-temperature water, while 0.66 g of caffeine...

0.20 g of caffeine dissolves in 10 mL of room-temperature water, while 0.66 g of caffeine will dissolve in 10 mL of boiling water. A. If a 5.0 g sample of caffeine is to be recrystallized from water, calculate the minimum amount of water required. B. A student uses 75.0 mL of water in order to recrystallize a 5.0 g sample of caffeine. Once cooled to room temperature, calculate the amount of caffeine remaining in the water and thus lost...

0.070g of caffeine is dissolved in 4.0ml of water. Calculate the total amount of caffeine that...

0.070g of caffeine is dissolved in 4.0ml of water. Calculate the total amount of caffeine that can be extracted by: a) a 6.0ml portion of methylene chloride b) three 2.0ml portions of methylene chloride Caffeine has a distribution coefficient of 4.6, between methylene chloride and water.

0.170g of caffeine is dissolved in 10.0mL of water. The caffeine is extracted from the aqueous...

0.170g of caffeine is dissolved in 10.0mL of water. The caffeine is extracted from the aqueous solution three times with 5.0-mL portions of methylene chloride. Calculate the total amount of caffeine that can be extracted into three portions of methylene chloride. Caffeine has a distribution coefficient of 4.6 between methylene chloride and water. Please explain throughoutly. This is my first time working with extraction question

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A student dissolved 10.5 g of NH4Cl in 40 mL of water. The temperature of the water changed from 22.5oC to 5.1oC. Calculate the enthalpy of hydration of ammonium chloride in J/mol. 1. A student collected the data below while performing a kinetics experiment. Trial Volume of 2.0 M Reactant A Volume of 0.5 M Reactant B Volume of H2O Time for B to react 1 10 mL 10 mL 30 mL 135 sec 2 20 mL 10 mL 20 mL 69 sec...

1.250 g of H2C2O4 are dissolved into 100.0 ml of water which is then titrated with...

1.250 g of H2C2O4 are dissolved into 100.0 ml of water which is then titrated with 28.56 ml of NaOH solution. What is the molarity of the NaOH solution? H2C2O4 + NaOH arrow Na2C2O4 + H2O (not balanced) Select one: a. 0.6942 M b. 2.957 M c. 0.4862 M d. 1.945 M e. The correct answer is not given as an option.

1, When 4.0 mole of LiI is dissolved 1000.0 ml of water, what resulting molality (m)...

1, When 4.0 mole of LiI is dissolved 1000.0 ml of water, what resulting molality (m) is used to calculate the change in boiling point of the water. 2, What mass ( in g) of NH3 must be dissolved in 1000.0 g of Methanol to make a 0.250m solution?

A 0.1276 g sample of an unknown monoprotic acid was dissolved in 25.0 mL of water...

A 0.1276 g sample of an unknown monoprotic acid was dissolved in 25.0 mL of water and titrated with 0.0633 M NaOH solution. The volume of base required to bring the solution to the equivalence point was 18.4 mL. (a) Calculate the molar mass of the acid. (b) After 10.0 mL of base had been added during the titration, the pH was determined to be 5.87. What is the Ka of the unknown acid? (10 points)

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