**Question:**A student evaluated the molar solubility of Mg(OH)₂ under a variety of conditions. In each of the following scenarios would the student expect to observe a reduced molar solubility due to the common ion effect? Explain your reasoning.a. Mg(OH)₂ was dissolved in a solution of 0.1 M MgCl₂.b. Mg(OH)₂ was dissolved in a solution of KOH.c. Mg(OH)₂ was dissolved in a solution of NaCl. **Explanation:**- In scenario (a), Mg(OH)₂ is dissolved in a solution of MgCl₂. Here, the common ion is Mg²⁺, which is shared between Mg(OH)₂ and MgCl₂. The presence of this common ion will lead to a reduced molar solubility of Mg(OH)₂.- In scenario (b), Mg(OH)₂ is dissolved in KOH. The common ion is OH⁻, present in both Mg(OH)₂ and KOH, which will also reduce the solubility of Mg(OH)₂ due to the common ion effect.- In scenario (c), Mg(OH)₂ is dissolved in NaCl. There are no common ions shared between Mg(OH)₂ and NaCl, so the molar solubility of Mg(OH)₂ is less likely to be affected by the common ion effect in this case.

The common-ion effect refers to the reduction in solubility of an ionic precipitate when a soluble substance having an ion in common with the precipitate is added to the solution. Adding a common ion decreases the solubility of a solute. a. Mg(OH)2 was dissolved in a solution of 0.1 M MgCl2: Ion of Mg(OH)2: Cation: Mg+2 Anion: 2OH- Ion of Mg(OH)2: Cation: Mg+2 Anion: 2Cl- Mg(OH)2 and MgCl2 have common ion Mg+. Due to the presence of common ion, the solubility of Mg(OH)2 in MgCl2 decreases. b. Mg(OH)2 was dissolved in a solution of KOH: Ion of Mg(OH)2: Cation: Mg+2 Anion: 2OH- Ion of KOH: Cation: K+ Anion: OH- Mg(OH)2 and KOH have common ion OH-. Due to the presence of common ion, the solubility of Mg(OH)2 in KOH decreases. c. Mg(OH)2 was dissolved in a solution of KOH: Ion of Mg(OH)2: Cation: Mg+2 Anion: 2OH- Ion of NaCl: Cation: Na+ Anion: Cl- Mg(OH)2 and NaCl have no common ion. Hence, there will no change in the solubility of Mg(OH)2 in NaCl.

Science

Chemistry

.. A student evaluated the molar solubility of Mg(OH)2 under a variety of conditions. In each of the following scenarios would the student expect to observe a reduced molar solubility due to the common ion effect? Explain your reasoning. a. Mg(OH)2 was dissolved in a solution of 0.1 M MgCl2. b. Mg(OH)2 was dissolved in a solution of KOH. c. Mg(OH)2 was dissolved in a solution of NaCl.

.. A student evaluated the molar solubility of Mg(OH)2 under a variety of conditions. In each of the following scenarios would the student expect to observe a reduced molar solubility due to the common ion effect? Explain your reasoning. a. Mg(OH)2 was dissolved in a solution of 0.1 M MgCl2. b. Mg(OH)2 was dissolved in a solution of KOH. c. Mg(OH)2 was dissolved in a solution of NaCl.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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