Refer to the Ksp values in Table 18.2 to calculate the molar solubility of each compound in pure water. a. AgBr

검증된 단계별 안내

Identify the dissolution equation for AgBr: \(\text{AgBr (s)} \rightleftharpoons \text{Ag}^+ (aq) + \text{Br}^- (aq)\).

Write the expression for the solubility product constant (\(K_{sp}\)) for AgBr: \(K_{sp} = [\text{Ag}^+][\text{Br}^-]\).

Let the molar solubility of AgBr be \(s\) mol/L. At equilibrium, \([\text{Ag}^+] = s\) and \([\text{Br}^-] = s\).

Substitute the equilibrium concentrations into the \(K_{sp}\) expression: \(K_{sp} = s \times s = s^2\).

Solve for \(s\) by taking the square root of the \(K_{sp}\) value: \(s = \sqrt{K_{sp}}\).

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Solubility Product Constant (Ksp)

The solubility product constant (Ksp) is an equilibrium constant that quantifies the solubility of a sparingly soluble ionic compound. It is defined as the product of the molar concentrations of the ions, each raised to the power of their coefficients in the balanced dissolution equation. For example, for AgBr, Ksp = [Ag+][Br-]. Understanding Ksp is essential for calculating the molar solubility of compounds in water.

Molar Solubility

Molar solubility refers to the maximum concentration of a solute that can dissolve in a solvent at equilibrium, typically expressed in moles per liter (mol/L). It is directly related to Ksp, as the molar solubility can be derived from the Ksp expression by substituting the concentrations of the ions in terms of the solubility. This concept is crucial for determining how much of a compound can dissolve in water.

Dissolution Equilibrium

Dissolution equilibrium describes the dynamic balance between the solid phase of a solute and its ions in solution. When a solid ionic compound dissolves, it dissociates into its constituent ions, and the rate of dissolution equals the rate of precipitation at equilibrium. This concept is fundamental for understanding how Ksp and molar solubility relate to the behavior of ionic compounds in solution.