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For a saturated solution of Zn(OH)2, calculate the activity of Zn and its effective pH in: a) water

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter22: An Introduction To Electroanalytical Chemistry

Section: Chapter Questions

Problem 22.10QAP

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Electrolysis

Electrolysis is defined as the process of breaking down ionic compounds into their constituent elements by passing a direct electric current through the compound in a fluid state. The cathode reduces cations, while the anode oxidizes anions. An electrolyte, electrodes, and some form of external power source are the main components required for conducting electrolysis. A partition, such as an ion-exchange membrane or a salt bridge, may also be used, but this is optional. These are primarily used to prevent the products from diffusing near the opposing electrode.

Question

For a saturated solution of Zn(OH)₂, calculate the activity of Zn and its effective pH in:
a) water
b.) 0.0237 M K₂SO₄
c.) a solution of pH 10

Ksp of Zn(OH)₂ = 3.0 x 10^-16

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