Development of a Contact Process Demonstration Tool n the Production of Sulfuric Acid to Improve Students' Learning Motivation on Chemical Equilibrium Concepts

Abstract

This study aimed to; (1) develop a teaching aid for the contact process of sulfuric acid production in chemical equilibrium materials; (2) to find out the influence of contact process teaching aids on increasing learning motivation. This study used a mixed-method research design with product development using R&D methods (Research and Development) using ADDIE (Analyze, Design, Development, Implement, Evaluation) model of product implementation and used a quasi-experimental method to test the effectiveness of the product. The contact process props are in the form of four sets of tools consisting of reactor 1 as a place for oxygen production, reactor 2 as a place for SO₂ production, a balance shift pipe as a place for SO³ production, and SO³ Absorption as a place where SO₃ meets H₂O to produce H₂SO₄. Contact process props provide students with visualizations of shifts in chemical equilibrium affected by pressure and volume. The feasibility test of material and language experts was 88.44% and the media feasibility test of 91.33% showed that contact process teaching aids on chemical equilibrium materials are very feasible as practicum media. The results of the independent t-test stated that there was an influence of the product on learning motivation with a significance value of  0.012. Contact process teaching aids provide learning with macroscopic representations to students, thus making learning about chemical equilibrium material interesting.