1. A buffer solution made from HClO and KClO has a pH of 7.79 . If pKa for HClO is 7.46 , what is the [ClO-- ] / [HClO] in the buffer? 2. The pKa value for H2S is 7.00. What mole ratio of KHS to H2S is needed to prepare a buffer with a pH of 6.70? [HS--] / [H2S]

1. A buffer solution made from HClO and KClO has a pH of 7.79 . If pKa for HClO is 7.46 , what is the [ClO-- ] / [HClO] in the buffer? 2. The pKa value for H2S is 7.00. What mole ratio of KHS to H2S is needed to prepare a buffer with a pH of 6.70? [HS--] / [H2S]

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter21: The Chemistry Of The Main Group Elements

Section: Chapter Questions

Problem 75GQ

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Question

1. A buffer solution made from HClO and KClO has a pH of 7.79 . If pK_a for HClO is 7.46 , what is the [ClO^-- ] / [HClO] in the buffer?

2. The pK_a value for H₂S is 7.00. What mole ratio of KHS to H₂S is needed to prepare a buffer with a pH of 6.70?

[HS^--] / [H₂S]

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