Select an in-line blender to mix alum with a design flow rate of 485 m3/h. The design water temperature is 10oC. Verify that the detention time and velocity gradient meet the design criteria for adsorption/destabilization. Assume that the water power is 80% of the motor power, that the mixing time must be between 0.3 and 0.8 s, and that there will be a stand-by mixer for redundancy. Because this problem will require some iteration, a spreadsheet solution is highly recommended.

In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?