A mass of 5.125 g of washing soda crystals were dissolved and made up to 250 cm' of solution. A 25.0 cm³ portion of the solution required 35.8 cm³ of 0.05 M sulphuric (VI) acid for neutralisation. Calculate the percentage of sodium carbonate in the crystals.a mass of 5.125 times of washing soda crystals or dissolved and made up to 250 cubic centimeters of solution