Abstract: In response to national policies promoting the integration of ideological and political education into curricula, this study explores an optimized teaching design for environmental science courses. Using the “weak acid dissociation equilibrium” chapter in the Inorganic Chemistry course for Environmental Science and Engineering majors as a case study, the research incorporates classic environmental issues such as acid rain and global challenges like ocean acidification into the teaching content. A problem-based case teaching approach was adopted to design a model that combines theoretical knowledge with practical applications. Through heuristic and inquiry-based learning, students were guided to gain a deep understanding of the scientific principles behind weak acid dissociation equilibrium and its relevance to environmental protection during classroom discussions and independent exploration. Teaching practice showed that this design significantly enhanced students' interest and participation in learning, while effectively promoting their sense of social responsibility, scientific thinking, and independent problem-solving skills. This study offers valuable insights for the deeper integration of ideological and political education with professional courses.

Key words: Environment science major, Inorganic chemistry, Curriculum ideological and politics, Teaching case, Weak acid dissociation equilibrium