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Number of moles of acidified potassium dichromate required to liberate 6 moles of iodine from an aqueous solution of Iodate ions

I came across this question in a recent exam I had taken: How many moles of acidified $\ce{K2Cr2O7}$ is required to liberate 6 moles of $\ce{I2}$ from an aqueous solution of $\ce{I-}$ ? So this is how I approached it (by writing the corresponding equations): $$ \require{cancel} \begin{align} \ce{ Cr2O7^2- + 14 H+ + \cancel{6e^-} […]