The solubility and diffusion coefficient of oxygen in potassium hydroxide solutions

摘要: The solubility of oxygen in aqueous KOH solutions has been measured by a Van Slyke apparatus and an adsorption technique developed Hildebrand. In the range concentration between 0 12 N, at 25°C, two methods yielded identical results; 760 torr partial pressure, log S = 1·26 × 10−3 − 0.1746 C, where 0·1746 is coefficient, oxygen, g-mol/l, C KOH, g-mol/l. Between 0° 60°C both coefficient decrease with increasing temperature. Diffusion coefficients were evaluated from limiting current on rotating disk electrode, also stagnant tube similar to that used von Stackelberg. diffusivity drops sharply concentration, increases temperature. At 25°C for concentrations 2 4 product viscosity constant: Dμ 1·3 10−7 g.cm/s2, D diffusivity, cm2/s, μ poise. 1 < N 8, value this 1·9 g.cm/s2.