The Diffusion Coefficient of Lactamide in Dilute Aqueous Solutions at 25° as Measured by the Gouy Diffusiometer

Isothermal Diffusion Measurements on the System H2O-Glycine-KCl at 25°; Tests of the Onsager Reciprocal Relation

“…Accordingly, because ZA and SA have already been determined, it is not now permissible to use the method of least squares to obtain £o, Ei and E2 of equation 43; we have used the method of successive approximations described following equation 22F to determine the ratios £o/£2 and E\/Ei in the following form of equation 43 É = [(E/E2) + m2] = (Eo/Ej) + ( /£2) (44) The approximate starting value of E2 required to calculate the first approximations for É was determined from the slope of a graph of (E -Ea)/ai versus a¡ (using for £0 the experimental value of Q/y/Da at ^0).…”

Refractive Index of Phosphoric Acid Solutions at 25° C.

“…Wendt and Costing (11) assumed that the relation between refractive index and concentration for aqueous lactamide solutions up to 2M could be expressed by a fourth-degree equation, and they determined the constants in the equation from the observed refractive increments of Gouy measurements. Similarly, the power series equation, which is extended until it represents the data adequately, was assumed to be applicable to phosphoric acid solutions = b0+ b¡x + b2x2 + b3x3 + ...…”

Measurements of Isothermal Diffusion at 25° with the Gouy Diffusiometer on the System Water-Sucrose-Potassium Chloride1,2

“…If ( 16) is satisfied but criterion (17) is not, convective mixing may occur, but instability will not necessarily exist in this case.31 The symbols in eq. 18 and 19 are defined by AV = ±[(D22 -Du ± i')Api -2D12Ap2]/(4f/) (20) K21 -± l (Dn -D22 ± U)Apt -2DnApi}/(4U) (21) ± = (Dn + D22 ± (/) / (2S2) (22) and…”