[wjswofls]

Our professor gave us an assignment and I have no idea how to answer this.
The pain reliever phenacetin is soluble in cold water to an extent of 1.0 g /1310 ml and soluble in diethyl ether to an extent of 1.0 g /90 mL.
a) Determine the approximate distribution coefficient for phenacetin in those two solvents.
b) If 150 g of phenacetin were dissolved in 100 mL of water, how much ether would be required to extract 90% of phenacetin in a single extraction?

Can someone help me?

[sjb]

Can you define distribution coefficient? What are your thoughts?