25. Solving a chemistry problem

The sulfate contained in 1.151 g of the sample was precipitated by the homogeneous precipitation method by adding 50.0 ml of 0.0264 M Ba EDTA solution and acidifying slowly to release barium ions. At the end of the precipitation, the solution was buffered to pH = 10 and diluted exactly to 250.0 ml. Titration of 25.0 ml of a clear solution required 28.7 ml of a standard solution of 0.0154 M Mg2+ solution. Calculate the % content of Na2SO4*10H2O in the sample.