Gold leaching in an aerated cyanide solution takes place according to the reaction: au+8cn22h20-4au(cn)2+4oh assume that the mass transfer of dissolved oxygen to the gold surface controls the rate. calculate the initial rate (g s) of dissolution of a spherical 100 μm (diameter) gold particle suspended in an aerated solution containing excess cyanide, atomic mass: o- 16, au- 197 concentration of dissolved oxygen in water 8 mg l mass transfer coefficient for a 60 μm gold particle 1 x 10-3 cm s-1