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2. When washing clothes, the presence of manganese may lead to staining. Specifically, water with a manganese [Mn2+ (aq)] concentration larger than 0.1 mg/L (1.8 x 10-6 M) may cause clothes to be stained by the manganese upon oxidation. This can be remedied by reducing the amount of Mn2+ in the water through addition of a base, which precipitate manganese ions in the form of Mn(OH)2 (Ksp = 2 x 10-13). What pH is needed to keep the concentration of Mn2+ in water equal to 1.8 x 10-6 M?

2. When washing clothes, the presence of manganese may lead to staining. Specifically, water with a manganese [Mn2+ (aq)] concentration larger than 0.1 mg/L (1.8 x 10-6 M) may cause clothes to be stained by the manganese upon oxidation. This can be remedied by reducing the amount of Mn2+ in the water through addition of a base, which precipitate manganese ions in the form of Mn(OH)2 (Ksp = 2 x 10-13). What pH is needed to keep the concentration of Mn2+ in water equal to 1.8 x 10-6 M?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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2. When washing clothes, the presence of manganese may lead to staining. Specifically, water with a manganese [Mn2* (ag)] concentration larger than 0.1 mg/L (1.8 x 10-6 M) may cause clothes to be stained by the manganese upon oxidation. This can be remedied by reducing the amount of Mn2+ in the water through addition of a base, which precipitate manganese ions in the form of Mn(OH)2 (Ksp = 2 x 10-13). What pH is needed to keep the concentration of Mn2+ in water equal to 1.8 x 10-6 M?
Transcribed Image Text:2. When washing clothes, the presence of manganese may lead to staining. Specifically, water with a manganese [Mn2* (ag)] concentration larger than 0.1 mg/L (1.8 x 10-6 M) may cause clothes to be stained by the manganese upon oxidation. This can be remedied by reducing the amount of Mn2+ in the water through addition of a base, which precipitate manganese ions in the form of Mn(OH)2 (Ksp = 2 x 10-13). What pH is needed to keep the concentration of Mn2+ in water equal to 1.8 x 10-6 M?
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