次碘酸
次碘酸（HIO）是用氧化汞与碘水混合时制得的。它很不稳定，迅速发生歧化反应：
- 5HIO → HIO3 + 2I2 + 2H2O
活泼的次碘酸盐可由碱金属氢氧化物与碘单质反应制得。它们也能迅速歧化成碘化物和碘酸盐。
理论上次碘酸是很强的消毒剂，因为碘和水的反应与氯气和水的反应类似。
Hypoiodous acid
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Hypoiodous acid 次碘酸
Hypoiodous acid is the inorganic compound with the chemical formula HIO. It forms when an aqueous solution of iodine is treated with mercuric or silver salts. It rapidly decomposes by disproportionation:
Hypoiodous acid is a weak acid with a pKa of about 11. The conjugate base is hypoiodite (IO). Salts of this anion can be prepared by treating I2 with alkali hydroxides. They rapidly disproportionate to form iodides and iodates.
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