摘要
文中探讨了测定蔗糖水解反应速率常数的优化方法,发现读取旋光度后按复测键再次读数并取平均值计算得到的速率常数结果与理论值符合较好。在优化方法基础上研究了盐酸浓度和温度的改变对反应速率常数的影响。得到随催化剂浓度的增大和温度的升高,速率常数k随之变大。根据阿累尼乌斯公式,求出蔗糖水解反应活化能为108 k J/mol,与文献值完全吻合,表明该改进的实验方法是合理的。
We performed the optimization method of determination of sucrose hydrolysis rate constant. We found that the rate constant obtained by reading optical rotation by repeating again to obtain average values of optical rotation in accordance with literature result.On the basis of the optimization method,we studied the influence of the concentration of hydrochloric acid and temperature on the reaction rate constant. With the increasing of the catalyst concentration and temperature,the rate constant k became bigger. According to the Arrhenius formula,the sucrose hydrolysis reaction activation energy is 108 k J / mol,which is the same as the literature value. This indicates that the improved experimental method is reasonable.
出处
《实验科学与技术》
2015年第4期1-3,共3页
Experiment Science and Technology
基金
安徽省高校省级自然科学研究基金资助项目(KJ2013Z256)
安徽省省级科研机构校级委托专项基金资助课题(2013HJJC02
2011HJJC04YB)
阜阳师范学院博士科研启动基金资助项目
国家级大学生创新创业训练计划基金资助项目(2013103 71018)
关键词
蔗糖水解
优化方法
速率常数
活化能
sucrose hydrolysis
optimization method
rate constant
activation energy
