Task $6$: Membrane process $(3$P$)$

Using the reverse osmosis process $($RO$),$ drinking water should be produced from a NaCl$-$solution

with a weight fraction of $W_{\text{N}\text{a}\text{C}\text{l}}=0\mathrm{.}045$ or a concentration of $C_{\text{N}\text{a}\text{C}\text{l}}=7\mathrm{.}3*{10}^{-3}mo\frac{l}{m^3}.$ Calculate the

osmotic pressure of the NaCl$-$solution. What is the minimum allowable pressure in the membrane

system? Justify your answer with a formula. Additionally draw a membrane module with full

description. $(T=25C)$