What is the H⁺ ion concentration in a 2.1 × 10⁻⁴ M Ca(OH)₂ solution?

Question

Quizplus · Accepted Answer

Calcium hydroxide, Ca(OH)2, dissociates into one Ca2+ ion and two OH- ions for each formula unit that dissolves. The concentration of Ca2+ ions in a 2.1 × 10^-4 M Ca(OH)2 solution is directly the same as the initial concentration of Ca(OH)2, which is 2.1 × 10^-4 M. However, the question seems to ask for the concentration of OH- ions or possibly the ion product of water (Kw) given the unusual notation. Assuming a typical dissociation into OH- ions, each Ca(OH)2 unit produces two OH- ions, doubling the concentration of OH- ions to 4.2 × 10^-4 M. However, none of the provided options match this calculation directly, suggesting a possible misinterpretation of the question's notation or an error in the provided options. Given the standard approach to such a problem, the correct answer would typically involve calculating the concentration of ions produced by the dissociation of Ca(OH)2. If the question intended to ask for the ion product of water (Kw) in the context of the solution's pH or pOH, the calculation would involve additional steps not directly related to the concentration of Ca(OH)2. The provided options and the question's notation suggest a potential misunderstanding or miscommunication in the question's intent.

What Is the H+ Ion Concentration in a 2

What Is the H⁺ Ion Concentration in a 2