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2005年广东省高考化学试题第27题和1988年全国高考第五大题中的第2题,均以草酸合铁酸钾为背景进行命题,题干上虽有许多相似之处,但命题意图上却有着明显的不同。一、题目及解析题目1(2005年广东省高考化学第27题) 化合物 K_xFe(C_2O_4)_y·zH_2O 是一种重要的光化学试剂,其中铁为+3价。分别称取该样品0.491g 两份,其中一份在110℃干燥脱水,至质量恒定为0.437g。另一份置于锥形瓶中,加入足量的3mol·L~(-1)H_2SO_4
In 2005, the 27th title of the Guangdong Provincial College Entrance Exam Chemical Questions and the 2nd title of the 1988 National College Entrance Exam Question 5 were all based on the background of potassium oxalate ferrate. Although there are many similarities in the title, the proposition intent There are obvious differences. First, the title and analytical title 1 (2005 Guangdong Provincial College Entrance Chemistry 27) Compound K_xFe(C_2O_4)_y·zH_2O is an important photochemical reagent, in which iron is +3 valence. Weigh 0.491g of the sample, one of which was dried and dehydrated at 110°C to a constant mass of 0.437g. Place another flask in a conical flask and add enough 3mol·L -1 H_2SO_4