2009 AP Chemistry化学真题系列之简答题Form B免费下载

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2009 AP Chemistry Free-Response Questions （Form B）Free Download

2009 AP 化学简答题 Form B部分免费下载

考试时会提供花常用的等式与常量

以及化学元素周期表

此套Section II试卷共6题

每道大题含有不同数量的小题

共计时95分钟

Part A计55分钟，第1-3题各20分

Part B计40分钟，第四题值10分，第5第6题各15分

部分真题预览：

Section II, Part A,YOU MAY USE YOUR CALCULATOR FOR PART A可使用计算器：

2）A student performed an experiment to investigate the decomposition of sodium thiosulfate, Na₂S₂O₃ , in acidic solution, as represented by the equation above. In each trial the student mixed a different concentration of sodium thiosulfate with hydrochloric acid at constant temperature and determined the rate of disappearance of S₂O₃²⁻(aq). Data from five trials are given below in the table on the left and are plotted in the graph on the right.

1. Identify the independent variable in the experiment.
2. Determine the order of the reaction with respect to S₂O₃^2-. Justify your answer by using the information above.
3. Determine the value of the rate constant, k, for the reaction. Include units in your answer. Show how you arrived at your answer.
4. In another trial the student mixed 0.10 M Na₂S₂O₃ with hydrochloric acid. Calculate the amount of time it would take for the concentration of S₂O₃^2- to drop to 0.020 M.
5. On the graph above, sketch the line that shows the results that would be expected if the student repeated the five trials at a temperature lower than that during the first set of trials.

2009 AP Chemistry化学 FRQ微积分（Form B）完整版答案免费下载

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2009 AP Chemistry Free-Response Questions Free Download

2009 AP 化学简答题部分免费下载

考试时会提供花常用的等式与常量

以及化学元素周期表

此套Section II试卷共6题

每道大题含有不同数量的小题

共计时95分钟

Part A计55分钟，第1-3题各20分

Part B计40分钟，第四题值10分，第5第6题各15分

下载方式请点击下方链接

2009 AP Chemistry FRQ真题题目

完整版真题资料可以底部二维码免费领取↓↓↓

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