On Application of Hand-held Technology in High School Chemistry Inquiry Experiment——Determination of Vc in Commercial Beverages Based on Fe2+-phen Chromogenic Method
With the development of basic education curriculum reform ,the traditionally authenticating and qualitative chemistry experiments are gradually turned to be heuristic and quantitative ,which is the new experimental type .As a novel approach ,hand-held technology has been applied in the quantitative and multivariable research and used in the chemistry teaching of middle school .In the paper ,the issue of re-search on beverage in our life locates in the optional six-subject two of senior high school chemistry text-book ,which was chosen as an example for the application of the hand-held technology in the middle school chemistry education.Based on the chromogenic reaction of ferrous ion and phenanthroline ,an inquiry ex-periment has been designed for the measurement of Vitamin C(Vc) in the beverage using the hand-held method ,and investigated the influencing factors of the reaction system .The experimental design is appro-priate to life ,the principle is simple and easy to understand ,which greatly stimulates students'interest in learning and cultivates their science inquiry spirits .Thus ,we provide a reference for the application of hand-held technology in high school chemistry experimental education .
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