Orthoperiodic acid - Orthoperiodic acid

Japanese: オルト過ヨウ素酸 - オルトカヨウソサン
Orthoperiodic acid - Orthoperiodic acid

H 5 IO 6 (227.94). As an I Ⅶ oxo acid, it is more stable than periodic acid HIO 4. Commercially, this substance is called periodic acid, but the IUPAC distinguishes between the two. Melting point is approximately 130 °C. The following equilibrium exists in an aqueous solution of periodic acid:

H 5 IO 6 H + + H 4 IO 6 - ( K 1×10 -3 )

H 4 IO 6 - IO 4 - + 2H 2 O( K 29)

H 4 IO 6 - H + + H 3 IO 6 2- ( K 2×10 -7 )

In aqueous solutions at 25 °C, IO 4 - is the predominant ion. [CAS 10450-60-9]

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

Japanese:

H5IO6(227.94).Iのオキソ酸としては,過ヨウ素酸HIO4より安定である.市販品では,この物質を過ヨウ素酸とよぶが,IUPACでは両者を区別している.融点約130 ℃.過ヨウ素酸水溶液中では,次の平衡が成立している.

  H5IO6 H + H4IO6(K 1×10-3)

  H4IO6 IO4 + 2H2O(K 29)

  H4IO6 H + H3IO62-(K 2×10-7)

25 ℃ の水溶液ではIO4がおもなイオンである.[CAS 10450-60-9]

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