Chlorine Displacing Iodine from Potassium Iodide

Cl2 + 2KI → 2KCl + I2

概述

Chlorine displaces iodine from potassium iodide solution because chlorine is more electronegative and a stronger oxidizer than iodine. The solution turns brown from the liberated iodine, which can be confirmed with starch indicator turning blue-black.

参与者

角色 物质 系数 状态
反应物 Chlorine Cl 1 (g)
产物 Iodine I 1 (s)
产物 Potassium Chloride KCl 2 (aq)

日常示例

The starch-iodine test, where freed iodine turns starch blue-black, is a common chemistry experiment demonstrating this halogen displacement.

工业重要性

理解卤素置换顺序对水消毒化学和卤素制造工艺非常重要。

属性

类型
Single Replacement
可逆
否
能量
放热
ΔH
-170.0 kJ/mol

相关反应

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Frequently Asked Questions

What is the equation for Chlorine Displacing Iodine from Potassium Iodide?
The balanced equation is: Cl₂ + 2KI → 2KCl + I₂.
What type of reaction is Chlorine Displacing Iodine from Potassium Iodide?
Chlorine Displacing Iodine from Potassium Iodide is a single replacement reaction.
Is Chlorine Displacing Iodine from Potassium Iodide exothermic or endothermic?
Chlorine Displacing Iodine from Potassium Iodide is exothermic (releases energy). The enthalpy change (ΔH) is -170.0 kJ/mol.