eletrolysis of dilute NaI
2008-04-29 1:43 am
Why the solution, sodium iodide, becomes alkaline after time? State the half-equations can also help. Does it also happen to the electrolysis of NaCl, when diluted, the solution becomes alkaline too? And are carbon electrodes used in the reaction?
回答 (1)
2008-04-29 3:38 am
✔ 最佳答案
the iodide react with water to form hydroiodic acid and hydroxide ion . so the reaction is alkaline.
hydroiodic acid is a weak acid, it is only slightly ionized.
but hydrochloric acid is a strong acid. it is completely ionized.
so chloride ion will not form hydrochloric acid again.
and the solution will not be alkaline.
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