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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: monday on December 05, 2007, 01:57:01 PM

Title: writing a balanced equation
Post by: monday on December 05, 2007, 01:57:01 PM

 potassium permanganate (kmno4) is decolourised by na2s2o8.I think i'm o.k with calculating the concentrations,just don't know how to write the equation.basically,I can't figure out the products....can anyone help?

Title: Re: writing a balanced equation
Post by: sondakem on December 05, 2007, 02:19:38 PM

Determine the valence level of each of the elements in the reaction.  You will find that one of the is quite unusual.  Bring it to a more usual value by balancing it against the Mn valence change in the decolorization.