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A 0.5504-g sample of KHP (potassium hydrogen phthalate, KHC8H4O4; molar mass = 204.22 g/mol) is completely dissolved in enough deionized water to make 50.00 mL of solution. The resulting solution is titrated with a NaOH solution of unknown concentration. If 21.50 mL of the base solution is needed to reach the end-point, what is the molar concentration of NaOH solution? The reaction occurs as follows:                 NaOH(aq)  +  KHC8H4O4(aq)  -->  NaKC8H4O4(aq)  +  H2O(l)               (A) 0.2457 M           (B) 0.1254 M           (C) 0.05390 M           (D) 0.03823 M

A 0.5504-g sample of KHP (potassium hydrogen phthalate, KHC8H4O4; molar mass = 204.22 g/mol) is completely dissolved in enough deionized water to make 50.00 mL of solution. The resulting solution is titrated with a NaOH solution of unknown concentration. If 21.50 mL of the base solution is needed to reach the end-point, what is the molar concentration of NaOH solution? The reaction occurs as follows:                 NaOH(aq)  +  KHC8H4O4(aq)  -->  NaKC8H4O4(aq)  +  H2O(l)               (A) 0.2457 M           (B) 0.1254 M           (C) 0.05390 M           (D) 0.03823 M

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter12: Solutions
Section: Chapter Questions
Problem 12.104QE: A 10.00-mL sample of a 24.00% solution of ammonium bromide (NH4Br) requires 23.41 mL of 1.200 molar...
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A 0.5504-g sample of KHP (potassium hydrogen phthalate, KHC8H4O4; molar mass = 204.22 g/mol) is completely dissolved in enough deionized water to make 50.00 mL of solution. The resulting solution is titrated with a NaOH solution of unknown concentration. If 21.50 mL of the base solution is needed to reach the end-point, what is the molar concentration of NaOH solution? The reaction occurs as follows:

                NaOH(aq)  +  KHC8H4O4(aq)  -->  NaKC8H4O4(aq)  +  H2O(l)    

          (A) 0.2457 M

          (B) 0.1254 M

          (C) 0.05390 M

          (D) 0.03823 M

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