A 15.0 mL sample of 0.20 M of an unknown weak acid is titrated with 0.15 M NaOH at 25 oC. At 25 oC, the pKa of the weak acid is 4.06. What is the pH when 20.0 mL of titrant has been added to the analyte? Enter the answer to two decimal places.
A 15.0 mL sample of 0.20 M of an unknown weak acid is titrated with 0.15 M NaOH at 25 oC. At 25 oC, the pKa of the weak acid is 4.06. What is the pH when 20.0 mL of titrant has been added to the analyte? Enter the answer to two decimal places.
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter17: Principles Of Chemical Reactivity: Other Aspects Of Aqueous Equilibria
Section: Chapter Questions
Problem 2PS: Does the pH of the solution increase, decrease, or stay the same when you (a) add solid sodium...
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A 15.0 mL sample of 0.20 M of an unknown weak acid is titrated with 0.15 M NaOH at 25 oC. At 25 oC, the pKa of the weak acid is 4.06. What is the pH when 20.0 mL of titrant has been added to the analyte? Enter the answer to two decimal places.
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Step 1: Given data
VIEWStep 2: Calculation of moles of weak acid, NaOH and total volume
VIEWStep 3: Determination of ICE table and molarity of conjugate base
VIEWStep 4: Determination of new ICE table
VIEWStep 5: Calculation of Kb value
VIEWStep 6: Calculation of hydroxide ion concentration
VIEWStep 7: Calculation of pOH and pH value
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