How do i balance this chem. equation?

Question

I'm writing an essay on home-made alchometers, and have to balance the following equation, but i have no idea how.. The normal redox-approach doesn't seem to work. Any ideas?

Cr2O7(2-)    +   CH3CH2OH      →     Cr(3+)         +       CH3COOH

Doctorwho · Accepted Answer

The actual total reaction (including spectator ions) is

3CH3CH2OH + 2K2Cr2O7 + 8H2SO4 → 3CH3COOH + 2K2SO4 + 2Cr2(SO4)3 + 11H2O

Walter W. Linstromberg, Organic Chemistry, D.C. Heath and Company, 1970, p 205

How do i balance this chem. equation?

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