课程名称︰普通化学甲下 课程性质︰必带 课程教师︰许益瑞 开课学院： 开课系所︰农业化学系 大气科学系 地质科学系 考试日期（年月日）︰98年3月27日 考试时限（分钟）：约30分钟，有延长 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1. (a)An aqueous solution of Fe(NO ) has only a pale color, but an aqueous 3 3 solution of K [Fe(CN) ] is bright red. Do you expect a solution of 3 6 K [FeF ] to be brightly colored or pale? Explain your reasoning. (30 points) 3 6 (b)Would you predict a solution of K [HgI ] to be colored or colorless? 2 4 Explain. (10 points) 2.Among the evidence used by Werner to establish the nature of octahedral + coordination complexes were halide precipitation reaction with Ag (aq). Only those halides not directly complexed to the metal ion could be precipitated. (a)How many moles of AgCl per mole of chloro compound would be expected for the following salts? (b)Give the proper systematic name for the three compounds. (c)Please describe the geometric isomers in these compounds. (i)Co(NH ) Cl (ii)Co(NH ) Cl (iii)Co(NH ) Cl (40 points) 3 3 3 3 4 3 3 6 3 2+ 3.Predict the number of unpaired electrons for [Ni(en) ] based on both 2 tetrahedral and square-planar structures, assuming that en acts as a strong field ligand. Based on the correlation between spin and stability, which geometry do you predict will be preferred? (40 points) --

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