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Different salts have different solubilities in water. For some salts, the addition of H+ or OH- to the solution can actually increase its solubility.

Different salts have different solubilities in water. For some salts, the addition of H+ or OH- to the solution can actually increase its solubility.

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter17: Solubility And Complex-ion Equilibria
Section: Chapter Questions
Problem 17.112QP
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Different salts have different solubilities in water. For some salts, the addition of H+ or OH- to the solution can actually increase its solubility. ▼ Part B As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the potential to kill weeds effectively. A sparingly soluble salt, Herbigon is dissolved in 1 M acetic acid for technical reasons having to do with its production. You have determined that the solubility product Ksp of Herbigon is 9.00x10-6 Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH3COO, where "X" represents the top-secret cation of the salt). It is this cation that kills weeds. Since it is critical to have Herbigon dissolved (it won't kill weeds as a suspension), you are working on adjusting the pH so Herbigon will be soluble at the concentration needed to kill weeds. What pH must the solution have to yield a solution in which the concentration of X+ is 4.00x10-3 M? The pK₂ of acetic acid is 4.76. Express your answer numerically. ▾ View Available Hint(s) Hint 1. How to approach the problem To solve this problem, begin with the solubility product equation. The definition of Ksp for Herbigon (XAC) is
Transcribed Image Text:Different salts have different solubilities in water. For some salts, the addition of H+ or OH- to the solution can actually increase its solubility. ▼ Part B As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the potential to kill weeds effectively. A sparingly soluble salt, Herbigon is dissolved in 1 M acetic acid for technical reasons having to do with its production. You have determined that the solubility product Ksp of Herbigon is 9.00x10-6 Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH3COO, where "X" represents the top-secret cation of the salt). It is this cation that kills weeds. Since it is critical to have Herbigon dissolved (it won't kill weeds as a suspension), you are working on adjusting the pH so Herbigon will be soluble at the concentration needed to kill weeds. What pH must the solution have to yield a solution in which the concentration of X+ is 4.00x10-3 M? The pK₂ of acetic acid is 4.76. Express your answer numerically. ▾ View Available Hint(s) Hint 1. How to approach the problem To solve this problem, begin with the solubility product equation. The definition of Ksp for Herbigon (XAC) is
▼ Jivis acid is 4.76... Express your answer numerically. View Available Hint(s) ME BE IT IN VI ▶ Hint 1. How to approach the problem To solve this problem, begin with the solubility product equation. The definition of Ksp for Herbigon (XAc) is Hint 2. Determine the maximum [Ac 1 Ksp = [X][Ac ] Use the known Ksp value along with your desired X value to determine the maximum concentration of acetate ion allowed. Next, use the K₂ equation for acetic acid to determine the quantity of H needed to get that desired concentration of acetate ion. Finally, convert the H value to pH. Using the equation Hint 3. Determine [H] P Pearson Review Constants I Periodic Ta dag vi v pH = -log[H 10 of 1 cation Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us |
Transcribed Image Text:▼ Jivis acid is 4.76... Express your answer numerically. View Available Hint(s) ME BE IT IN VI ▶ Hint 1. How to approach the problem To solve this problem, begin with the solubility product equation. The definition of Ksp for Herbigon (XAc) is Hint 2. Determine the maximum [Ac 1 Ksp = [X][Ac ] Use the known Ksp value along with your desired X value to determine the maximum concentration of acetate ion allowed. Next, use the K₂ equation for acetic acid to determine the quantity of H needed to get that desired concentration of acetate ion. Finally, convert the H value to pH. Using the equation Hint 3. Determine [H] P Pearson Review Constants I Periodic Ta dag vi v pH = -log[H 10 of 1 cation Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us |
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