{"knowledge_schema": {"broad_category": "Chemistry \u2192 Acid-Base Reactions \u2192 Solubility and pH Calculations", "refinement": "This problem involves calculating the amount of a strong acid required to dissolve a specific mass of a sparingly soluble compound (Fe(OH)3) and determining the resulting pH of the solution.", "specific_scope": "The focus is on the dissolution of iron(III) hydroxide in the presence of a strong acid, considering the stoichiometry of the reaction and the dissociation of the acid in solution.", "goal": "Calculate the minimum volume of a 0.1 M strong acid needed to dissolve 0.1 g of Fe(OH)3 and determine the pH of the resulting solution."}, "summary": "This problem is centered on acid-base chemistry, specifically the dissolution of a sparingly soluble compound (Fe(OH)3) in a strong acid solution. The task requires calculating the volume of a 0.1 M monobasic strong acid necessary to dissolve 0.1 g of Fe(OH)3 and subsequently determining the pH of the resulting solution. The answer indicates that 30.09 cm3 of the acid is needed, resulting in a pH of 2.69."}