APSC 150 Case 3- Lab 3 Problems

APSC 150 Case 3- Lab 3 Problems - APSC 150 - Case 3:...

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APSC 150 - Case 3: Separation of Minerals by Froth Flotation. Laboratory 3 1) Fine crystals of silver iodide (AgI) were placed in a 0.005 mol/dm 3 potassium nitrate (KNO 3 ) solution. Calculate: a) the ionic strength of the background solution, b) the surface potential of silver iodide crystals, c) the thickness of the electrical double layer around the crystals, d) the zeta potential of the crystals assuming that the shear plane is positioned 5 Angströms away from the AgI surface. Are the crystals positively or negatively charged under these conditions ? The solubility product, K SO , of silver iodide is 8.5*10 -17 , while the point of zero charge (pzc) of silver iodide is at pAg = 5.6. 2) A copper ore containing chalcopyrite exhibits excellent liberation characteristics with the entire amount of copper occurring in the fully liberated state. Froth flotation is considered as the main process to recover chalcopyrite from the ore. The particle size distribution of the liberated chalcopyrite particles can be given as:
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This note was uploaded on 11/14/2010 for the course APSC 150 taught by Professor Muhan during the Spring '10 term at Wooster.

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