(10分)下列转化关系图中,A、B、C、D、E常温下为气体,B、E、F、K


(10分)下列转化关系图中,A、B、C、D、E常温下为气体,B、E、F、K为单质,其中F为黑色固体;C、D均能使澄清的石灰水变混浊,D、E均能使品红溶液褪色;I是一种红棕色固体氧化物。

       请回答下列问题:

(1)C的电子式为   

(2)检验溶液L中金属阳离子的方法是   

(3)反应③的离子方程式为   

(4)F与G的浓溶液反应的化学方程式为   

(5)气体A的密度为2.68g·L1(标准状况),通过计算、推理,可确定A的分子式为 

答案

(共10分,每空2分)  (1)

(2)向溶液中滴加KSCN溶液,滴加氯水,溶液变为红色

(3)Cl2+2H2O+SO2=4H+2Cl+SO42

(4)C+2H2SO4(浓)CO2↑+2SO2↑+2H2O

(5)SCO

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