Answer to Question #185944 in General Chemistry for ary

Question

Formaldehyde has a distribution coefficient, KD = 0.111 at 25°C. How many liters of water will be required to remove in one extraction, 95% of the formaldehyde from 1.0 L of ether containing 0.5 g, of formaldehyde?

Answer 1

The adsorption-desorption distribution coefficient (Kd) is an important parameter for understanding the mobility of a compound in the environment and its distribution between water, sludge, soil and sediment compartments. 

The calculation of Kd is concentration on the solids (mg kg–1 dry solid) divided by concentration in the pore water (mg L–1), giving units of L kg–1.