What is the principle behind the acid-base titration method, and how can it be used to determine the concentration of an unknown solution? a) Acid-base titration relies on the principle of chemical equilibrium to determine unknown concentrations. b) Acid-base titration utilizes the principle of electrochemistry to analyze solutions. c) Acid-base titration is based on the principles of gravitational force and buoyancy. d) Acid-base titration relies on the principle of radioactive decay to determine unknown concentrations.