为什么氟不可以置换出碘?

2025-03-16 03:13:13
推荐回答(4个)
回答1:

因为由于氟的强非金属性与强氧化性,它会优先和水反应2F2+2H2O=4HF+O2,所以不会置换,而CL2则不会,它没有那么强的氧化性,不会和水大量反应,所以可以发生Cl2+2I离子=2CL离子+I2。

回答2:

在水溶液中氟几乎不置换出碘,而主要与水发生反应置换出O2(heliangxxx:2F2+2H2O=4HF+O2,所以不会置换←不准确,这个也是置换反应)。Cl2和水反应比较微弱,Cl2分子能一定量存在于水溶液中与I-反应:Cl2+2I-=2Cl-+I2(I2较多时溶液混浊)。
另外,在熔融状态下,单质氟是可以置换出碘的。

回答3:

1.F2会继续氧化碘,生成碘的含氧酸
2."氟会先和水反应生成氧气"因为溶液中水比I-多,并不是因为什么优先置换,再说I-总比H2O还原性强吧
3.会生成氟化碘
HI + 3F2 =适当条件= HF + IF5
KI + 4F2 = KF + IF7 (无水)

回答4:

氟会先和水反应生成氧气
2F2+2H2O=4HF+O2

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