{"knowledge_schema": {"broad_category": "Chemistry \u2192 Acid-Base Reactions \u2192 Titration", "refinement": "This problem involves the titration of a weak acid (acetic acid) with a strong base (sodium hydroxide) and determining the pH at the equivalence point.", "specific_scope": "The focus is on calculating the pH of the solution at the equivalence point after diluting acetic acid and titrating it with NaOH.", "goal": "To find the pH of the solution at the equivalence point of the titration, which involves understanding the properties of the resulting salt (sodium acetate) and its hydrolysis in water."}, "summary": "This problem is centered around the titration of acetic acid, a weak acid, with sodium hydroxide, a strong base. After diluting the acetic acid and performing the titration, the goal is to determine the pH at the equivalence point. At this point, all the acetic acid has reacted with NaOH to form sodium acetate, which will hydrolyze in water, resulting in a basic solution. The calculated pH at the equivalence point is 8.72, indicating the solution is basic due to the presence of the acetate ion."}