{"knowledge_schema": {"broad_category": "Chemistry \u2192 Acid-Base Chemistry \u2192 Titration", "refinement": "This problem involves the dilution of an acid solution and its subsequent titration with a strong base, focusing on the calculation of pH at different stages of the titration process.", "specific_scope": "The specific context is the titration of diluted acetic acid with sodium hydroxide, requiring the determination of the pH after dilution and at the equivalence point.", "goal": "Calculate the pH of the diluted acetic acid solution before titration and the pH at the equivalence point during titration with NaOH."}, "summary": "This problem involves acid-base chemistry, specifically the titration of acetic acid with sodium hydroxide. Initially, we dilute a 0.05 M acetic acid solution and then titrate it with a 0.1 M NaOH solution. The task is to determine the pH of the diluted acetic acid solution and the pH at the equivalence point of the titration. Understanding the properties of weak acids and strong bases, as well as the concept of equivalence points in titration, is essential for solving this problem."}