2010 AP Chemistry化學(xué)真題系列之簡答題免費下載

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2010 AP Chemistry Free-Response Questions Free Download

2010 AP 化學(xué)簡答題部分免費下載

考試時會提供花常用的等式與常量

以及化學(xué)元素周期表

此套Section II試卷共6題

每道大題含有不同數(shù)量的小題

共計時95分鐘

Part A計55分鐘，第1-3題各20分

Part B計40分鐘，第四題值10分，第5第6題各15分

完整版下載鏈接見文末

部分真題預(yù)覽：

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

1）Several reactions are carried out using AgBr, a cream-colored silver salt for which the value of the solubility product constant, K_sp , is 5.0 × 10^?13 at 298 K.

1. Write the expression for the solubility-product constant, K_sp , of AgBr.
2. Calculate the value of [Ag+] in 50.0 mL of a saturated solution of AgBr at 298 K.
3. A 50.0 mL sample of distilled water is added to the solution described in part (b), which is in a beaker with some solid AgBr at the bottom. The solution is stirred and equilibrium is reestablished. Some solid AgBr remains in the beaker. Is the value of [Ag⁺] greater than, less than, or equal to the value you calculated in part (b) ? Justify your answer.
4. Calculate the minimum volume of distilled water, in liters, necessary to completely dissolve a 5.0 g sample of AgBr(s) at 298 K. (The molar mass of AgBr is 188 g mol^-1.)
5. A student mixes 10.0 mL of 1.5 × 10^?4 M AgNO³ with 2.0 mL of 5.0 × 10^?4 M NaBr and stirs the resulting mixture. What will the student observe? Justify your answer with calculations.
6. The color of another salt of silver, AgI(s), is yellow. A student adds a solution of NaI to a test tube containing a small amount of solid, cream-colored AgBr. After stirring the contents of the test tube, the student observes that the solid in the test tube changes color from cream to yellow.
   1. Write the chemical equation for the reaction that occurred in the test tube.
   2. Which salt has the greater value of K_sp : AgBr or AgI ? Justify your answer.

 

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