Two aquous sodium hydroxide solutions containing 10 wt% NaOH (SG = 1.1089) and 50 wt% NaOH (SG = 1.5253) are mixed to form a 6.1 molar solution (SG = 1.2191). Note: standard atomic mass of sodium is 22.99 u.

a) Calculate the mass fraction of sulfuric acid, xNaOH, in the product solution.

b) Calculate the volumetric feed ratio (liters 10 wt% solution/ liter 50 wt% solution).

(1) Draw a flow chart and set one unknown as a basis(i.e., 100kg)

(2) Degree of freedom analysis

(3) Solve the unknown values

(4) Obtain feed ratio

c) What feed rate of the 50% solution (L/h) would be required to produce 1200 kg/h of the product?