12. The following quantities of salts were added to a volume of water to make 1 liter of solution: 1 x 10-2moles NaCl 2 x 10-2 moles CaCl, 2 × 10-² moles BaCl, (a) What is the ionic strength of the solution? (b) A small amount of phosphate salt is added to the same solution with negligible change in ionic strength. Given K = 10-7-2 for the reaction H,PO,= H+ + HPO,?- Calculate [H*][HPO,²-]/[H,PO,"), called °K, using the Güntelberg ap- proximation of the DeBye-Hückel law. (c) Calculate the "salting-out" coefficient, k,, for a nonelectrolyte in the same solution if its activity is 10-3 M and its concentration is 9.5 x 10 M.
12. The following quantities of salts were added to a volume of water to make 1 liter of solution: 1 x 10-2moles NaCl 2 x 10-2 moles CaCl, 2 × 10-² moles BaCl, (a) What is the ionic strength of the solution? (b) A small amount of phosphate salt is added to the same solution with negligible change in ionic strength. Given K = 10-7-2 for the reaction H,PO,= H+ + HPO,?- Calculate [H*][HPO,²-]/[H,PO,"), called °K, using the Güntelberg ap- proximation of the DeBye-Hückel law. (c) Calculate the "salting-out" coefficient, k,, for a nonelectrolyte in the same solution if its activity is 10-3 M and its concentration is 9.5 x 10 M.
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter12: Chemical Equilibrium
Section: Chapter Questions
Problem 12.11PAE
Related questions
Question
![12. The following quantities of salts were added to a volume of water to make
1 liter of solution:
1 x 10-2 moles NaCl
2 x 10-2 moles CaCl,
2 x 10-2 moles BaCl,
(a) What is the ionic strength of the solution?
(b) A small amount of phosphate salt is added to the same solution with
negligible change in ionic strength. Given K = 10-7.2 for the reaction
H,PO, = H+ + HPO,?-
Calculate (H*][HPO,2-1/[H,PO,"), called °K, using the Güntelberg ap-
proximation of the DeBye-Hückel law.
(c) Calculate the "salting-out" coefficient, k,, for a nonelectrolyte in the same
solution if its activity is 10-3 M and its concentration is 9.5 x 10 4 M.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F22ace5cb-53da-4a61-aefb-a5b307082c8e%2Fbba17bbc-5384-494a-a615-fea0bbfdd372%2F0wauv4m_processed.png&w=3840&q=75)
Transcribed Image Text:12. The following quantities of salts were added to a volume of water to make
1 liter of solution:
1 x 10-2 moles NaCl
2 x 10-2 moles CaCl,
2 x 10-2 moles BaCl,
(a) What is the ionic strength of the solution?
(b) A small amount of phosphate salt is added to the same solution with
negligible change in ionic strength. Given K = 10-7.2 for the reaction
H,PO, = H+ + HPO,?-
Calculate (H*][HPO,2-1/[H,PO,"), called °K, using the Güntelberg ap-
proximation of the DeBye-Hückel law.
(c) Calculate the "salting-out" coefficient, k,, for a nonelectrolyte in the same
solution if its activity is 10-3 M and its concentration is 9.5 x 10 4 M.
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