10:15 PM Sun Mar 193.0.10 M formic acid (HCHO₂) Ka = 1.8 x 10-40.10 M sodium formate (NaCHO₂)5TAYou are given dropper bottles of the reagents listed below. Describe two ways to prepare a bufferat a pH of 3.50.0.10 M acetic acid (HC₂H30₂) Ka = 1.8 x 10-50.10 M sodium acetate (Na C₂H30₂)0.10 M carbonic acid (H₂CO3) Ka = 4.3 x 10-70.10 M sodium bicarbonate (NaHCO3)100%+ :0.10 M KOH0.10 M HCI0.10 M boric acid (H3BO3) Ka = 5.8 x 10-100.10 M sodium borate (NaH₂BO3)

Answer: Following solutions can be mixed: Formic acid + KOH Sodium formate and HCl

5 You are given dropper bottles of the reagents listed below. Describe two ways to prepare a buffer at a pH of 3.50. 0.10 M formic acid (HCHO₂) Ka = 1.8 x 10-4 0.10 M sodium formate (NaCHO₂) 0.10 M acetic acid (HC₂H30₂) Ka = 1.8 x 10-5 0.10 M sodium acetate (Na C₂H30₂) 0.10 M carbonic acid (H₂CO3) Ka = 4.3 x 10-7 0.10 M sodium bicarbonate (NaHCO3) 0.10 M KOH 0.10 M HCI 0.10 M boric acid (H3BO3) Ka = 5.8 x 10-10 0.10 M sodium borate (NaH₂BO3)

5 You are given dropper bottles of the reagents listed below. Describe two ways to prepare a buffer at a pH of 3.50. 0.10 M formic acid (HCHO₂) Ka = 1.8 x 10-4 0.10 M sodium formate (NaCHO₂) 0.10 M acetic acid (HC₂H30₂) Ka = 1.8 x 10-5 0.10 M sodium acetate (Na C₂H30₂) 0.10 M carbonic acid (H₂CO3) Ka = 4.3 x 10-7 0.10 M sodium bicarbonate (NaHCO3) 0.10 M KOH 0.10 M HCI 0.10 M boric acid (H3BO3) Ka = 5.8 x 10-10 0.10 M sodium borate (NaH₂BO3)

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter15: Additional Aqueous Equilibria

Section: Chapter Questions

Problem 15.BCP

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