Calculations for titration.

How do you do redox titration calculations?

• I have several more problems to do like this, but if someone could please walk me through this step by step? It is a little pressing, as I need it by tomorrow morning, but please do what you can! Thank you. ------------- Potassium dichromate reacts with potassium oxaolate according to the equation: 3K2C2O4 (aq) + K2Cr2O7 (aq) + 8H+ → 6CO2 (g) + Cr2O3 (s) + 4H2O (l) + 8K+ (aq) when 0.2016 g of anhydrous potassium oxalate was dissolved in dilute acid and titrated with a solution of potassium dichromate, the volume required to reach the endpoint was 17.97 mL. Calculate the concentration of the potassium dichromate solution.

• Answer:

  3 moles of potassium oxalate reacts with 1 mole of potassium dichromate. 0.2016 g K2C2O4 / 166.2 g/mol = 0.001213 mol 0.001213 x (1/3) = 0.0004043 mol K2Cr2O7 0.4043 millimoles = 17.97 mL x M Molarity = 0.0225 mol/liter CORRECTED. Sorry for the goof (2/3 instead of 1/3)