本研究針對普化實驗之「平衡常數測定」單元，以實驗研究法探討媒體教學之改進成效。本研究以嘉南藥學專科學校五年制應用化學科三個班級的學生為教學對象，其中兩班為實驗組分別進行投影片及幻燈片教學，另一班為控制組進行傳統講解教學，利用測驗卷及問卷分別施以前測及後測，分析探討利用媒體教學的學習成就及學習興趣，本研究結果有助於改進普化實驗之教學成效。 An experimental study were carried out to improvement of the teaching of the “Determination of equilibrium constant”, one of the general chemistry experiment units. Three classes of students in the Applied Chemistry Department of chia Nan Junior College of Pharmacy are used as teaching model. Two of the three classes which taken as experimental groups were proceeded by transparency and slide-aided teaching, respectively. The remaining class, underwent traditional teaching, was taken as control group. The tests using examination sheet and questionnaire are given before and after the course. We evaluated the learning achievment and affectiveness by the usage of teaching medium. The results show that medium-assisted teaching has significant effect in the improvement of the general chemistry experiment.