Q: 1: The distribution constant for iodine between an organic solvent and H;O is 85. Find the concentration of I; remaining in the aqueous layer after extraction of 50.0ml. of 1.00 x 10 M I with the following quantities of the organic solvent: (a) 50.0 ml.; (b) two 25.0 ml. portions; (c) five 10.0 ml. portions.

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Q: 1: The distribution constant for iodine between an organic solvent and H,0
is 85. Find the concentration of I; remaining in the aqueous layer after extraction
of 50.0ml. of 1.00 x 10 M I with the following quantities of the organic
solvent: (a) 50.0 ml.; (b) two 25.0 ml. portions; (c) five 10.0 ml. portions.
Q: 2: An acidic solute, HA, has an acid dissociation constant of 1.00 x10, and a
partition coefficient between water and benzene of 3.00. Calculate the extraction
efficiency when 50.00 ml. of a 0.025 M aqueous solution of HA buffered to a pH of
3.00, is extracted with 50.00 mL of benzene. Repeat for cases in which the pH of the
aqueous solution is buffered to 5.00 and 7.00.
Transcribed Image Text:Q: 1: The distribution constant for iodine between an organic solvent and H,0 is 85. Find the concentration of I; remaining in the aqueous layer after extraction of 50.0ml. of 1.00 x 10 M I with the following quantities of the organic solvent: (a) 50.0 ml.; (b) two 25.0 ml. portions; (c) five 10.0 ml. portions. Q: 2: An acidic solute, HA, has an acid dissociation constant of 1.00 x10, and a partition coefficient between water and benzene of 3.00. Calculate the extraction efficiency when 50.00 ml. of a 0.025 M aqueous solution of HA buffered to a pH of 3.00, is extracted with 50.00 mL of benzene. Repeat for cases in which the pH of the aqueous solution is buffered to 5.00 and 7.00.
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