{"knowledge_schema": {"broad_category": "Chemistry \u2192 Coordination Chemistry \u2192 Complex Formation", "refinement": "This problem involves calculating the distribution of metal-ligand complexes in solution based on stability constants and concentrations of free ions.", "specific_scope": "The focus is on determining the percentage of the FeF2+ complex in a solution containing Fe(III) and fluoride ions, given specific stability constants and concentrations.", "goal": "Calculate the percentage of the FeF2+ complex relative to all iron species present in the solution."}, "summary": "This problem is rooted in coordination chemistry, specifically the formation of metal-ligand complexes. It requires calculating the distribution of iron(III) fluoride complexes in a solution based on given stability constants and concentrations of free ions. The goal is to find the percentage of the FeF2+ complex among all iron species, which involves applying the stability constants to determine the concentrations of each complex formed. The answer to the problem is 18.2%."}