在Fe(OH)3中,逐滴加入HI稀溶液,会发生一系列变化,请简述原因。

在Fe(OH)3中,逐滴加入HI稀溶液,会发生一系列变化,请简述原因。

(1)固体溶解,溶液显黄色,原因是     ;有关离子方程式为           

(2)最后溶液颜色加深,原因是           ;有关离子方程式为          。

 

答案

(1)H+与Fe(OH)3发生中和反应 3H++Fe(OH)3Fe3++3H2O

(2)I-与Fe3+发生氧化还原反应生成I2 2I-+2Fe3+2Fe2++I2

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