Suppose solute a has a distribution coefficient of 1.0 between water and diethyl ether. demonstrate that if 100 ml of a solution of 5.0g of a in water were extracted with two 25ml portions of ether, a smaller amount of a would remain in the water than if the solution were extracted with one 50-ml portion of ether.

Explained

Explanation:

a) performing extraction of 25 ml of ether each time

K= 1=

solving we get x= 4 g dissolved in water

5-x=1 g dissolved in ether

second extraction

K= 1 =

solving this we get x= 3.2g dissolved in water

4-x= 3.2 g dissolved in ether

combining the two extractions 0.97 g of A extracted into ether that is 97% is extracted

b) performing one extraction 50% ether

distribution coefficient , K is the concentration of solute dilute to that to the solvent water

K= 1.0=

solving we get

x= 3.33 g dissolved in water

and 5-x= 1.67 dissolved in ether

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence