Chlorous acid - aensosan (English spelling) chlorous acid

Japanese: 亜塩素酸 - あえんそさん(英語表記)chlorous acid
Chlorous acid - aensosan (English spelling) chlorous acid
Chemical formula: HClO 2 . It is an unstable acid that is formed as an intermediate when chlorine dioxide reacts with water.
2ClO 2 +H 2 O→HClO 2 +HClO 3
However, it immediately decomposes according to the following formula:
4HClO 2 →3ClO 2 +1/2Cl 2 +2H 2 O
By reacting with alkali instead of water, chlorite is obtained along with perchlorate.
2ClO 2 +2KOH→KClO 2 +KClO 3 +H 2 O
Aqueous solutions of chlorite exhibit strong oxidizing properties, and heavy metal salts easily explode when heated or shocked.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
化学式 HClO2 。不安定な酸で二酸化塩素が水と反応するとき中間的に生じる。
2ClO2+H2O→HClO2+HClO3
しかし,ただちに次式に従い分解する。
4HClO2→3ClO2+1/2Cl2+2H2O
水の代りにアルカリと反応させると過塩素酸塩とともに亜塩素酸塩が得られる。
2ClO2+2KOH→KClO2+KClO3+H2O
亜塩素酸塩の水溶液は強い酸化性を示し,また重金属塩は加熱および衝撃により容易に爆発する。

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