Ion Concentration Calculator
Calculate the concentration of individual ions released when an ionic compound dissolves in water. This calculator determines cation and anion concentrations, total dissolved ions, and the ionic strength of the solution.
When an ionic compound dissolves in water, it dissociates into its constituent cations and anions. The concentration of each ion depends on the stoichiometry of the dissociation reaction. For example, one mole of CaCl₂ produces one mole of Ca²⁺ and two moles of Cl⁻, so a 0.1 M CaCl₂ solution has 0.1 M Ca²⁺ and 0.2 M Cl⁻.
Ionic strength is a measure of the total concentration of ions in solution, weighted by the square of their charges. It is defined as I = 0.5 × Σ(cᵢ × zᵢ²), where cᵢ is the molar concentration and zᵢ is the charge of each ion. Ionic strength affects activity coefficients, solubility, and the rates of reactions between charged species.
Understanding ion concentrations is critical in analytical chemistry, environmental science, water treatment, and biochemistry. It plays a key role in calculating activity coefficients using the Debye-Hückel equation, predicting precipitation reactions, and determining the behavior of electrolyte solutions.