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A2 Chemistry - Manganese chemistry watch

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    http://www.chemguide.co.uk/inorganic...manganese.html

    Does anyone know the reaction when the Mn(H2O)4(OH)2 ppt is left on standing, i.e. oxidised?
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    i think its oxidised - do u get a data booklet if so the electrochemistry will be outlined there
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    (Original post by Widowmaker)
    http://www.chemguide.co.uk/inorganic...manganese.html

    Does anyone know the reaction when the Mn(H2O)4(OH)2 ppt is left on standing, i.e. oxidised?
    ON exposure to air the hydrxide is oxidised and darkens to the Mn(IV) oxide via the formation of Mn(III) sesquioxide Mn2O3 which is also black
    Mn(OH)2 --> Mn2O3 --> MnO2

    all three are solids
 
 
 
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