Determination of Alkali Hydroxide Concentration Based on Green Consideration

Abstract

The classic experiment "determination of alkali hydroxide concentration" is widely used in chemical and pharmaceutical industries, as well as in university chemistry laboratory teaching. Therefore, disposal of the solutions produced by titration and prevention of their environmental pollution are very important in chemistry laboratory teaching, as well as in the industrial processes. We have selected the methods of visual colorimetry and potentiometric titration to determine potassium hydroxide concentration as an experiment for chemistry lab teaching based on green consideration. The solution produced by titration can be used directly in irrigating the plant, Spathiphyllum kochii. The teaching experiment will help students acquire methods for designing chemical experiments based on green consideration and inspire their interests of learning chemical courses.