25,00 ml of H2C2O6 is titrated with a 0,3500 M NaOH solution. The chemical equation is H2C2O6 + 2 NaOH ---> Na2C2O6 + 2 H2O The equivalent foint is reached when 10,15 ml og NaOH is used from the burette.  What is the M of  the H2C2O6 solution?

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