We dissolve 3.54 g of an unknown acid, HA, in enough water to produce 25.0 mL of solution. We titrate this solution with a 0.250 M solution of NaOH. It takes 20.7 mL of the NaOH solution to reach the equivalence point. The pH at the equivalence point is 12.00. (a) What is the molar mass of HA? (b) What is the pKa value of HA(aq)? (c) What was the original pH of the solution of HA(aq)?
We dissolve 3.54 g of an unknown acid, HA, in enough water to produce 25.0 mL of solution. We titrate this solution with a 0.250 M solution of NaOH. It takes 20.7 mL of the NaOH solution to reach the equivalence point. The pH at the equivalence point is 12.00. (a) What is the molar mass of HA? (b) What is the pKa value of HA(aq)? (c) What was the original pH of the solution of HA(aq)?
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
Chapter21: Chemistry Of The Main-group Elements
Section: Chapter Questions
Problem 21.196QP
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We dissolve 3.54 g of an unknown acid, HA, in enough water to produce 25.0 mL of solution. We titrate this solution with a 0.250 M solution of NaOH. It takes 20.7 mL of the NaOH solution to reach the equivalence point. The pH at the equivalence point is 12.00.
(a) What is the molar mass of HA?
(b) What is the pKa value of HA(aq)?
(c) What was the original pH of the solution of HA(aq)?
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