A dialysis process is carried out using a membrane 0.012 mm thick and an area of 1.5 m². The mass-transfer coefficient on the blood side is estimated as k_c1 =1.25X10^-5 m/s and in the dialysis, fluid is 3.33X10^-5 m/s. The permeability of the membrane is 8.73X10^-6 m/s. The concentration of the urea in the blood is 3.3 x 10^-6 g urea/ mL and that in the dialyzing fluid will be assumed as 0.

Calculate the flux and the rate of removal of urea at steady state in g/h

Calculate the time required to remove 90% of the urea from the blood.

Calculate the required area to decrease this time 50%. Explain your answers.