Textbook Question
The value of Ksp for Cd(OH)2 is 2.5 × 10-14. (a) What is the molar solubility of Cd(OH)2?
Ch.17 - Additional Aspects of Aqueous Equilibria
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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Table of contents
- Ch.1 - Introduction: Matter, Energy, and Measurement140
- Ch.2 - Atoms, Molecules, and Ions192
- Ch.3 - Chemical Reactions and Reaction Stoichiometry172
- Ch.4 - Reactions in Aqueous Solution156
- Ch.5 - Thermochemistry151
- Ch.6 - Electronic Structure of Atoms137
- Ch.7 - Periodic Properties of the Elements127
- Ch.8 - Basic Concepts of Chemical Bonding143
- Ch.9 - Molecular Geometry and Bonding Theories167
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces97
- Ch.12 - Solids and Modern Materials129
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics175
- Ch.15 - Chemical Equilibrium107
- Ch.16 - Acid-Base Equilibria127
- Ch.17 - Additional Aspects of Aqueous Equilibria133
- Ch.18 - Chemistry of the Environment88
- Ch.19 - Chemical Thermodynamics140
- Ch.20 - Electrochemistry137
- Ch.21 - Nuclear Chemistry99
- Ch.22 - Chemistry of the Nonmetals66
- Ch.23 - Transition Metals and Coordination Chemistry69
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry11
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Not the one you use?Change textbook
Chapter 17, Problem 108
The solubility product for Zn1OH22 is 3.0 * 10-16. The formation constant for the hydroxo complex, Zn1OH242 - , is 4.6 * 1017. What concentration of OH- is required to dissolve 0.015 mol of Zn1OH22 in a liter of solution?
Verified step by step guidance1
Identify the dissolution reaction for Zn(OH)_2: Zn(OH)_2 (s) \(\rightleftharpoons\) Zn^{2+} (aq) + 2OH^- (aq).
Write the expression for the solubility product (K_{sp}): K_{sp} = [Zn^{2+}][OH^-]^2.
Identify the formation reaction for the hydroxo complex: Zn^{2+} (aq) + 4OH^- (aq) \(\rightleftharpoons\) [Zn(OH)_4]^{2-} (aq).
Write the expression for the formation constant (K_f): K_f = \(\frac{[Zn(OH)_4^{2-}\)]}{[Zn^{2+}][OH^-]^4}.
Set up the equilibrium expressions and solve for [OH^-] using the given K_{sp} and K_f values, considering the total concentration of Zn(OH)_2 initially present.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Solubility Product (Ksp)
The solubility product constant (Ksp) is an equilibrium constant that applies to the solubility of sparingly soluble ionic compounds. It is defined as the product of the molar concentrations of the ions, each raised to the power of their coefficients in the balanced equation. For Zn(OH)2, Ksp = [Zn^2+][OH^-]^2, which helps determine the concentration of ions in a saturated solution.
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Solubility Product Constant
Formation Constant (Kf)
The formation constant (Kf) quantifies the stability of a complex ion in solution. It is defined as the equilibrium constant for the formation of a complex from its constituent ions. In this case, Kf for Zn(OH)4^2- indicates how readily Zn^2+ ions react with OH- ions to form the hydroxo complex, influencing the solubility of Zn(OH)2 in the presence of hydroxide ions.
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Equilibrium and Le Chatelier's Principle
Equilibrium in chemistry refers to the state where the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products. Le Chatelier's Principle states that if a system at equilibrium is disturbed, it will shift in a direction that counteracts the disturbance. This principle is crucial for understanding how changes in OH- concentration affect the solubility of Zn(OH)2 and the formation of its hydroxo complex.
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Related Practice
Textbook Question
A solid sample of Fe1OH23 is added to 0.500 L of 0.250 Maqueous H2SO4. The solution that remains is still acidic. Itis then titrated with 0.500 M NaOH solution, and it takes12.5 mL of the NaOH solution to reach the equivalencepoint. What mass of Fe1OH23 was added to the H2SO4solution?
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Textbook Question
The solubility product constants of PbSO4 and SrSO4 are 6.3 * 10-7 and 3.2 * 10-7, respectively. What are the values of 3SO4 2 - 4, 3Pb2 + 4, and 3Sr2 + 4 in a solution at equilibrium with both substances?
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Textbook Question
(a) Write the net ionic equation for the reaction that occurs when a solution of hydrochloric acid (HCl) is mixed with a solution of sodium formate 1NaCHO22.
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Textbook Question
(a) A 0.1044-g sample of an unknown monoprotic acid requires 22.10 mL of 0.0500 M NaOH to reach the end point. What is the molar mass of the unknown?
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