Exploring Influence of Reactant Concentration,Catalyst,Temperature on Reaction Rate Using Hand-held Technology
With the advantages of simplicity,portability,easy operation and real-time data presentation,the digital hand-held technology experiments has become an innovative teaching tool of the chemistry classroom in secondary schools.It is helpful for students to learn chemical concepts and develop their cognitive level.Based on the digital experiment of hand-held technology,this work adopted gas pressure sensor to explore the effect of HCl concentration on the rate of reaction between hydrochloric acid and magnesium,as well as the effect of dosage of FeCl3 catalyst and temperature on the decomposition rate of hydrogen peroxide.Since reaction is endothermic or exothermic,effect of heat has been considered along the whole process.The obtained"pressure-time"curves and the calculated reaction rates would offer directly comparison,thus leading to an easy understanding of the influence of reactant concentration,catalyst,and temperature on reaction rate.
digital hand-held technology experimentschemical reaction rategas pressure sensor
NETL
NSTL
万方数据
维普
