In this action research study, I propose a guided inquiry alternative to the traditional physical chemistry laboratory module where the equilibrium constant of acetic acid is determined conductometrically. I complement the guided inquiry structure with a 360° feedback support framework for the preparation and assessment of a laboratory report. The new laboratory module showed great promise, improving both report marks and student experiences. Diligent training of teaching assistants, ample availability of formative feedback, and reservation of sufficient time for the guided inquiry activities were identified as key contributors for the success of the module.