- = Two aqueous sulphuric acid solutions containing 20.0 wt% H2SO4, (p = 1139 kg/m) and 60.0 wt% H2SO4 (p 1498 kg/m) are mixed to form a 4.00 molar solution (p = 1213 kg/m). (a) Calculate the mass fraction of sulphuric acid in the product solution. (b) Taking 100 kg of the 20% feed solution as a basis, draw and label a flowchart of this process, labelling both masses and volumes, and do the degree-of-freedom analysis. Calculate the feed ratio (volume of 20% solution/volume of 60% solution). (c) What feed rate of the 60% solution (L/h) would be required to produce 1250 kg/h of the product