51. Solving a chemistry problem

125. 1.3041 g of a preparation containing magnesium sulfate was placed in a beaker, dissolved in water (50.00 ml) and titrated with a 0.2017 M solution of barium chloride on a high-frequency titrator. Determine the mass fraction of magnesium sulfate in the preparation.
The data is given in the table:
V(BaCl2), ml 115.0 116.0 117.0 118.0 119.0 220.0 221.0 222.0 223.0 224.0 225.0
Indications
device,
affairs. 880.0 881.0 779.3 880.4 881.2 880.0 771.3 558.2 443.2 229.1 115.0