51. To a solution containing 0.7500 g of oxalic acid dihydrate (H2C2O4 * 2H2O) was added 25.00 ml of a solution of potassium hydroxide (KOH), the residue of which was titrated with 4.02 ml of a 0.1250 M solution of hydrochloric acid (HCl). Calculate the molar concentration of KOH.

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