# chemistry

posted by .

Suppose a compound Z had a partition coefficient of 8.0 in ether-water. If 10.0 g of Z was dissolved in 100 mL of water, and if the water solution was extracted with two 100 mL portions of ether, answer the following questions. show your calculation.

a) What is the total amount of Z contained in the 200 mL of ether extract after the two extractions?

b) Instead of using two 100ml portions of ether. a single extraction had been carried out using one 200 mL portion of ether. What weight of Z would be contained in the ether solution under these conditions?

• chemistry -

Ko/d = ( in organic layer)/(in water layer)
Let x = Z in organic layer., then 10-x = Z in water layer. Then
8.0 = (x/100mL ether)/[(10-x)/100 mL water]

Solve for x, and go through a second extraction, add the two to find total Z in both ether extracts.

For b part redo with 200 mL instead of 100 mL.
Show your work if you get stuck.

• chemistry -

I got x= 8.88 g
the second extraction you mean the same solve, that means I should do 8.88+8.88= total of z?

## Similar Questions

1. ### chemistry -drbob222

I'm not sure if my 1 and 2 are correct, and I don't know how to do 3, 4, and 5. Any help is appreciated! 1) You wish to extract an organic compound from an aqueous phase into an organic layer. to minimizing the number of transfer steps, …
2. ### Chem

Suppose solute A has a distribution coefficient of 1.0 between water and diethyl ether. Demonstrate that of 100mL of a solution of 5.0g of A in water were extracted with two 25-mL portions of ether, a smaller amount of A would remain …
3. ### chemistry

Suppose that a compound Z had a partition coefficient of 8 in ether-water. If 10g of z was dissolved in 100mL of water, and if the water solution was extracted with two 100 mL portions of ether, answer the following questions a) what …
4. ### organic chemistry

suppose solute A has a partition coefficient of 4.0 between diethyl ether and water. Demonstrate that if 100mL of solution of 5.0g of A in water were extracted with two 25mL portion of diethyl ether, a smaller amount of A would remain …
5. ### science

calculate the % of compound A extrcted if an aqueous solution containing 5.0g/100 ml is extracted with 33ml of diethyl ether thrice.(partition for ether-water distribution=4:1)
6. ### Chemistry

A) A compound distributes between water (solvent 1) and benzene (solvent 2) with Kp = 2.7. If 1.0g of the compound were dissolved in 100mL of water, how much compound could be extracted by three 10-mL portions of benzene?
7. ### CHEMISTRY

Assume an organic compound has a partition coefficient between water and diethyl ether equal to 7.33. If there are initially 9.81 grams of the compound dissolved in 100.0 mL of water, how many grams will remain in the aqueous layer …
8. ### CHEMISTRY

Assume an organic compound has a partition coefficient between water and diethyl ether equal to 7.33. If there are initially 9.81 grams of the compound dissolved in 100.0 mL of water, how many grams will remain in the aqueous layer …
9. ### Chemistry

The distribution coefficient between ether and water for aspirin at room temperature is 3.5. What weight of aspirin would be extracted by a single extraction with 60 ml of water from a solution of 10 grams of aspirin in 100 ml of ether?
10. ### organic chemistry

4. A 300-ml aqueous solution containing 40 g compound A is to be extracted with ether. The solubility of compound A in either at room temperature is 20 g per 100 ml and in water is 13.3 g per 100 ml. calculate the weight of the compound …

More Similar Questions