In the hydrometallurgical production of copper cathodes, the copper mineral ore bodies can be leached in aerated acidic aqueous solutions as follow: 2Cu+O2+4H+2Cu2++2H2O If we assume that the rate of the reaction is controlled by mass transport of dissolved oxygen to the surface of copper metal. Calculate the maximum rate of dissolution (g/h) of 300m (diameter) copper spheres, with a density of 3.6g/cm3, that are fed to a stirred reactor at rate of 30t/h. The aqueous phase mass transfer coefficient for oxygen is 1103cm/s and the solubility of oxygen in equilibrium with air is 2.5104mol/L. Describe what steps you can take in an attempt to increase the rate of dissolution