Question: Calculate the time required to completely dissolve a 50m(diameter) spherical gold particle suspended in an aerated solution containing an excess of cyanide. Known information: The

Calculate the time required to completely dissolve a 50m(diameter) spherical gold particle suspended in an aerated solution containing an excess of cyanide. Known information: The solubility of oxygen is 2.5.10-4 mol/l and the mass transfer coefficient for a 50m gold particle is 1.10-3 cm/s. The density of gold is 19.3 g/cm3.

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