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    When a primary alcohol is oxidised, which statement is correct?

    a) Primary alcohol -> aldehyde + H2O -> carboxylic acid
    b) Primary alcohol -> aldehyde + H2O -> carboxylic acid + H2O
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    (Original post by Magenta96)
    When a primary alcohol is oxidised, which statement is correct?

    a) Primary alcohol -> aldehyde + H2O -> carboxylic acid
    b) Primary alcohol -> aldehyde + H2O -> carboxylic acid + H2O
    you use acidified potassium dichromate which is in aqueous solution anyway, so water is not really a "by-product"

    and that water remains throughout your oxidation process.

    b is probably the more technically correct statement, but this is a weird question
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    I'm not quite sure at which stage your waters are coming in.

    Basically, the alcohol is oxidised to the aldehyde. The aldehyde then reacts with water to form the hydrate (1,1-diol), and then this is oxidised to the acid.
 
 
 
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