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ClO 3 -  Cl -

Dire se una soluzione 0,10 M di ClO 3 - è stabile o se si verifica la seguente dismutazione: 4ClO 3 - 3ClO 4 - +Cl - E°(ClO 3 - ,H + /Cl - )=1,45 V; E°(ClO 4 - ,H + /ClO 3 - )=1,19 V Determinare anche la costante di equilibrio. ClO 3 -  Cl -. + 6H +. + 6e -. + 3H 2 O. H 2 O +.

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ClO 3 -  Cl -

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  1. Dire se una soluzione 0,10 M di ClO3- è stabile o se si verifica la seguente dismutazione: 4ClO3- 3ClO4- +Cl- E°(ClO3-,H+/Cl-)=1,45 V; E°(ClO4-,H+/ClO3-)=1,19 V Determinare anche la costante di equilibrio. ClO3-  Cl- + 6H+ + 6e- + 3H2O H2O + +2H+ ClO3- ClO4- + 2e-

  2. ClO3- + 6e- + 6H+ Cl- + 3H2O H2O + ClO3- ClO4-+ 2H+ + 2e- 3

  3. DE > 0; la dismutazione è spontanea

  4. quando il DE = 0 il sistema è all’equilibrio

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