The charge balance equation for the solubility of cobalt sulfide is [H⁺] + 2 [Co²⁺] = 2 [S²⁻] + [OH⁻] To determine a more accurate solubility for cobalt sulfide,additional equilibria must be written for cobalt(II)and sulfide in solution.Which of the charge balance equations below is the only valid charge balance equation? A)[H⁺] + 2 [Co²⁺] + [CoOH⁺] + 3 [CoH³⁺] = 2 [S²⁻] + [HS⁻] + [OH⁻] B)[H⁺] + 2 [Co²⁺] + [CoOH⁺] = 2 [S²⁻] + [HS⁻] + [OH⁻] + 3 [SOH³⁻] C)[H⁺] + 2 [Co²⁺] + [CoOH⁺] = 2 [S²⁻] + [HS⁻] + [OH⁻] D)[H⁺] + 2 [Co²⁺] + 3 [CoH³⁺] = 2 [S²⁻] + [HS⁻] + [OH⁻] + 3 [SOH³⁻] E)[H⁺] + 2 [Co²⁺] + [CoOH⁺] + 3 [CoH³⁺] = 2 [S²⁻] + [HS⁻] + [OH⁻] + 3 [SOH³⁻]

Question

Quizplus · Accepted Answer

The only valid charge balance equation is C, as it balances the charges for the reactants and products without introducing any additional species that are not part of the original solubility equilibrium. The other choices introduce additional cobalt and/or sulfide species that are not accounted for in the original solubility equation, making them incorrect.

The Charge Balance Equation for the Solubility of Cobalt Sulfide