试题与答案

“碘钟”实验中,3I-+S2O82-I3-+2SO42-的反应速率可以用I3-与

题型:选择题

题目:

“碘钟”实验中,3I-+S2O82-I3-+2SO42-的反应速率可以用I3-与加入的淀粉溶液显蓝色的时间t来度量,t越小,反应速率越大。某探究性学习小组在20℃进行实验,得到的数据如下表:下列关于该实验的分析正确的是

[ ]

A.该实验的目的是探究反应物的浓度对反应速率的影响

B.显色时间t2=44.0s

C.若在40℃下进行编号③对应浓度的实验,显色时间t2的范围为>22.0s

D.通过分析比较上表数据得到的结论是升高温度反应速率加快

答案:

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