课程名称︰分析化学 课程性质︰化学系必修 课程教师︰陈俊显 开课学院：理学院 开课系所︰化学系 考试日期（年月日）︰2012-11-26 考试时限（分钟）：110 mins 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 满分130分 成绩乘以30％为期末总成绩 一共四大题：第一页三大题，之後是选择题 助教会在收卷前五分钟提醒各位。 有问题请举手招呼助教（不要念题目出来），由助教趋近回答，若有需要，助教会向同学 们宣布。 请遵循下列规定： 　＊选择题答案：直接作答在题目卷上。其余的则作答在答案卷上 　＊请务必在题目卷上与答案卷上签写姓名．学号，试卷必须缴回 　＊为了避免监考与应试同学之困扰，绝对禁止向同学询问．招呼．交谈．互相传递文具 　　或其他物品等等 　＊作答不必依序但必须清楚标示题号，如果没有标示题号，则不予计分，答非所问情形 　　，将斟酌予以扣分 　＊计算题：需要将式子列清楚，不必计算，进行数字上的运算与否，不纳入计分考量 I.(24%) Definition. Define the term and respond to the questions. (5%)(a)(i 3%) normal error curve; (ii2%) What is the range in the x-axis for the curve? (7%)(b)(i 3%) null hypothesis (ii4%) We talked about Box4-1, the correlation between breast cancer (乳癌) and menopausal (更年期) oestrogen-progestion hormone therapy (雌激素-黄体激素荷尔蒙疗法). What is the differnce in the use of null hypothesis between FDA(美国食品药物管理局) and Dr.Malcolm Pike, and epidemiologist? (6%)(c)(i 3%) internal standard; (ii3%) Give a plausible reason why a calibration curve can not be used and, therefore, the method of internal standard has to be applied to find out the concentration of the analyte. (6%)(d)(i 3%) activity coefficient (ii3%) Why do activity coefficient not appear in the charge and mass balance equations? II.(10%) Iodimetry/Iodometry. Given hte following reduction potentials I2(s) + 2e- ←→ 2I- Eﾟ=0.535V I2(aq)+ 2e- ←→ 2I- Eﾟ=0.620V I3- + 2e- ←→ 3I- Eﾟ=0.535V (6%)(a) Calculate the equilibrium constant for the reaction I2(aq) +I-←→I3-. (4%)(b)Why is iodine almost always used in a solution containing I-? III.(15%) Solving solubility by the systematic method. Find the solubility of Mg(OH)2(s) in a saturated solution. Consider the following reactions. Mg(OH)2(s) ←→ Mg2+ + 2OH- Ksp =7.1*10^-12 Mg2+ + OH- ←→ MgOH+ K1 =3.8*1^2 H20 ←→ H+ + OH- Kw =1.0*10^-14 Note:(1) Do this question by the 9-step treatment. You need to itemize the 9 steps in your answer. (2) You need to use "successive approximation" to solve the solubility. 选择题收回去了 发考卷之後再打> < --

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