When silver ion reacts with iodide ion, silver iodide is formed.
However, silver ion is an oxidising agent, while iodide ion is a reducing agent.
How come this is not a redox reaction?
(If it were a redox, the product would be silver and iodine.)
Reaction of silver ion and iodide ion
2007-02-03 8:53 pm
回答 (1)
2007-02-03 9:09 pm
✔ 最佳答案
Consider the redox reaction between silver ion and iodide ion :2Ag+(aq) + 2I-(aq) → 2Ag(s) + I2(aq)
Standard e.m.f. of the redox reaction is +0.26 V, and the reaction is feasible.
However, the activation energy of the redox reaction is much higher than that of the precipitation. Therefore, precipitate occurs instead of redox.
Precipitation : Ag+(aq) + Cl-(aq) → AgCl(s)
收錄日期: 2021-04-25 19:44:41
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