In a gravimetric titration involving a sparingly soluble product, which sequence describes endpoint determination using Q values and Ksp?

• A. Determine direction by comparing Q values, solve ICE with Ksp, then compute metal concentration from equilibrium concentrations.
• B. Skip Q and just weigh the precipitate.
• C. Use a color indicator to detect endpoint.
• D. Use only the initial concentrations and ignore Ksp.

Answer: (A)