【摘要】 利用绿色Led小灯珠作为光源,智能手机光传感器及App作为检测系统,通过测定透过光强度随时间的变化关系,探究高锰酸钾与草酸反应中反应物浓度及酸化时间对化学反应速率的影响。实验结果表明,用智能手机光传感器App法是一种低成本、简单、便携、直观可行的方法,可以使学生使用随身所带的智能手机开展实验研究,使实验教学具有趣味性和科学性,还能更好地培养学生的创新意识。更多还原

【Abstract】 The effects of concentration of reactants and acidification time on the chemical reaction rate of acid potassium permanganate with oxalic acid have been discovered by measuring the relationship between the intensity of transmission light and time,and using Led lamp as light source,a smart phone light sensor and the App as detectors.The experimental results show that the smartphone optical sensor App method is a low-cost,simple,portable,intuitive and feasible method.Moreover,it can enable the students to carry out their experimental research using the smartphone with them.In this way,it not only makes experimental teaching interesting and scientific,but also can cultivate students′ innovative consciousness better.更多还原