Assume an organic compound has a partition coefficient between water and ethyl acetate equal to 9.73. if there are initially 9.65 grams of the compound dissolved in 80.0 ml of water, how many grams will remain in the aqueous layer after extraction with two 10.0 ml portions of ethyl acetate?

Explanation:

1. First extraction

Let x = mass of compound extracted into ethyl acetate. Then

So, 5.30 g are extracted into the ethyl acetate.

Mass remaining in water = (9.65 – 5.30) g = 4.35 g

2. Second extraction

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

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explanation: