Exercise 15.8.3 A. If moist soil has a pH of 7.84, find the [H3O+] and [OH-] of the soil sample. B. When lime (CaO) is added to this soil, its pH increases to 8.42. Find the new [H3O+] and [OH-] of the soil sample. C. When sulfur is added to this soil, its pH decreases to 6.57. What is the new [H3O+] and [OH-] of the sample? Answer A [H3O+] = 1.4 × 108 M; [OH-] = 6.9 × 107 M Answer B [H3O+] = 3.8 × 10 M; [OH-] = 2.6 × 106 M Answer C [H3O+] =2.7 x 10-7 M; [OH-] = 3.7 × 108 M

Exercise 15.8.3 A. If moist soil has a pH of 7.84, find the [H3O+] and [OH-] of the soil sample. B. When lime (CaO) is added to this soil, its pH increases to 8.42. Find the new [H3O+] and [OH-] of the soil sample. C. When sulfur is added to this soil, its pH decreases to 6.57. What is the new [H3O+] and [OH-] of the sample? Answer A [H3O+] = 1.4 × 108 M; [OH-] = 6.9 × 107 M Answer B [H3O+] = 3.8 × 10 M; [OH-] = 2.6 × 106 M Answer C [H3O+] =2.7 x 10-7 M; [OH-] = 3.7 × 108 M

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter16: Acids And Bases

Section16.4: The Ph Scale

Problem 16.3SC

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