Calculate the mass of Na2SO4∙10H2O in one liter of solution, if 50.00 ml of a 0.1000 M Pb(NO3)2 solution was added to an aliquot of this solution with a volume of 10.00 ml, and 10.00 ml of 0.09000 was used to titrate excess lead nitrate M solution of Trilon B.

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