Problem 1. (25 points) The solute HCI (A) diffuses through a thin, stagnant film of water (B) 2.0 mm thick at 283 K. The concentration of HCI at point 1 at one boundary of the film is 12.0 wt% HCI (density P₁ =1060.7 kg/m³), and at the other boundary at point 2 is 6.0 wt% HCI (density p2 1030.3 kg/m³). The diffusion coefficient of HCI in water is 2.5 x 10-9m2/s. Assuming steady state, calculate (a) the molar flux of HCI in kmol/m² s,and (b) diffusion velocity of HCI and bulk flow velocity of water at 0.5 mm away from point 1 in the film.