The Diffusion of Copper Sulfate in Aqueous Solutions of Sulfuric Acid

Improved Capillary Method for Diffusivity Measurements

“…x 10"5 cm2/sec was found for 0.05 M CuSO* at 25°C, in good agreement with the result 0.66 x 10"5 found by Cole and Gordon (1936), adjusted for difference in temperature.…”

The Quantitative Aspect of Diffusion in Electrolyte Solutions.

“…The use of sintered-glass diaphragm cells for measuring diffusion coefficients has been shown by McBain (67) and especially by Gordon (14,32) and Hartley and Runnicles (43) to be convenient and accurate. Since the diffusion process is slow, measurements in vessels without diaphragms are most sensitive to any factors which, like local gradients of temperatures or initial stirring, may cause convection.…”

“…In these units the diffusion coefficient is related to 911 according to the equation: 9) = .-1000227 -(l + 0^^) (13) c \ dc / 2. Fick's second law By substituting the value of nv given by equation 1 in the equation of continuity ^+ V(nv) = 0 (14) where V-is recognized as the divergence, we obtain ^= V-9)Vn (15) in general and for unidirectional flow dn _ d gj dn dt dx dx (16) This is the law for the differential diffusion coefficient as defined by equation 1. If 9) is independent of the concentration, then dn _ q. dtn ~dt ~^dx2 (17) the familiar expression for Fick's second law.…”

Liquid‐liquid extraction with association effects

“…The simplest form of such a factor which could produce large variations of the type observed for the various systems was (20) ( n = an artiitrar~. The simplest form of such a factor which could produce large variations of the type observed for the various systems was (20) ( n = an artiitrar~.…”

“…Notwithstanding good temperature control the "pumping effect" suggested by Cole and Gordon (20) may have contributed to the scatter of results. A factor not taken into account in the calculation of the above results was that due to volume changes on mixing as proposed by Dullien and ShemiW1).…”