   Chapter 16, Problem 71E

Chapter
Section
Textbook Problem

# a. Calculate the molar solubility of AgI in pure water. Ksp for AgI is 1.5 × 10−16.b. Calculate the molar solubility of AgI in 3.0 M NH3. The overall formation constant for Ag(NH3)2+ is 1.7 × 107.c. Compare the calculated solubilities from parts a and b. Explain any differences.

(a)

Interpretation Introduction

Interpretation: The molar solubility of the given compound is to be calculated.

Concept introduction: Solubility is defined as the maximum amount of solute that can dissolve at a certain amount of solvent at certain temperature. The solubility product, Ksp is the equilibrium constant that is applied when salt partially dissolve in a solvent. The solubility product of dissociation of AxBy is calculated by the formula,

Ksp=[A]x[B]y

The number of moles of a given substance that can be dissolved in 1L of a given solution, before the solution is saturated, is known as molar solubility.

Explanation

Explanation

To determine: The molar solubility of AgI in pure water.

The molar solubility of AgI in pure water is 1.224×10-8mol/L_ .

Given

The Ksp of AgI is 1.5×1016 .

The dissociation reaction of AgI is,

AgIAg++I

The solubility of Ag+ is assumed to be smol/L .

The solubility product of dissociation of AgI is calculated by the formula,

Ksp=[Ag+][I]

The solubility of AgI can be calculated from the concentration of its ions at equilibrium.

It is assumed that smol/L of solid is dissolved to reach the equilibrium

(b)

Interpretation Introduction

Interpretation: The molar solubility of the given compound is to be calculated.

Concept introduction: Solubility is defined as the maximum amount of solute that can dissolve at a certain amount of solvent at certain temperature. The solubility product, Ksp is the equilibrium constant that is applied when salt partially dissolve in a solvent. The solubility product of dissociation of AxBy is calculated by the formula,

Ksp=[A]x[B]y

The number of moles of a given substance that can be dissolved in 1L of a given solution, before the solution is saturated, is known as molar solubility.

(c)

Interpretation Introduction

Interpretation: The molar solubility of the given compound is to be calculated.

Concept introduction: Solubility is defined as the maximum amount of solute that can dissolve at a certain amount of solvent at certain temperature. The solubility product, Ksp is the equilibrium constant that is applied when salt partially dissolve in a solvent. The solubility product of dissociation of AxBy is calculated by the formula,

Ksp=[A]x[B]y

The number of moles of a given substance that can be dissolved in 1L of a given solution, before the solution is saturated, is known as molar solubility.

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