2009 AP Chemistry化学真题系列之简答题免费下载

历年AP Chemistry化学系列

真题与答案下载

翰林国际教育全网首发

力争超快速发布最全资料

助你在升学路上一帆风顺

为你的未来保驾护航

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

完整版下载链接见文末

部分真题预览：

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

1）Answer the following questions that relate to the chemistry of halogen oxoacids.

1. Use the information in the table below to answer part (a)(i).
   1. Which of the two acids is stronger, HOCl or HOBr ? Justify your answer in terms of K_a .
   2. Draw a complete Lewis electron-dot diagram for the acid that you identified in part (a)(i).
   3. Hypoiodous acid has the formula HOI. Predict whether HOI is a stronger acid or a weaker acid than the acid that you identified in part (a)(i). Justify your prediction in terms of chemical bonding.
2. Write the equation for the reaction that occurs between hypochlorous acid and water.
3. A 1.2 M NaOCl solution is prepared by dissolving solid NaOCl in distilled water at 298 K. The hydrolysis reaction occurs.
   1. Write the equilibrium-constant expression for the hydrolysis reaction that occurs between OCl^-(aq) and H₂O(l) .
   2. Calculate the value of the equilibrium constant at 298 K for the hydrolysis reaction.
   3. Calculate the value of [OH^-] in the 1.2 M NaOCl solution at 298 K .
4. A buffer solution is prepared by dissolving some solid NaOCl in a solution of HOCl at 298 K. The pH of the buffer solution is determined to be 6.48.
   1. Calculate the value of [H3O⁺] in the buffer solution.
   2. Indicate which of HOCl(aq) or OCl⁻(aq) is present at the higher concentration in the buffer solution. Support your answer with a calculation.

完整版真题资料可以底部二维码免费领取↓↓↓