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= S.Pa A hollow fiber membrane filtration module has a hydraulic permeability of Lp 10-13 m. The effective fiber diameter d is 0.1 mm and length Lis 0.25 m. When the module works at transmembrane pressure Ap of 106 Pa, temperature T 298 K and use Naci with concentration C of 1.0 wt% as feed (blood) for calibration, its volumetric flow rate Q is 0.1 m3/day. We only consider pressure and osmosis driven filtration in this question, i.e. no diffusion is considered. Assume the osmotic (Staverman) reflection coefficient o = 1. (1) Calculate the osmotic pressure for this NaCl solution. (Hint: use van 't Hoff law and assume van't Hoff index i = for Nat and Cl-.) (2) Determine the total fiber number n contained in this module