Studies on Soap Solutions XII. Surface Tensions of Mixed Soap Solutions

Effect of the precipitation of neutral-soap, acid-soap, and alkanoic acid crystallites on the bulk pH and surface tension of soap solutions.

The natural pH of sodium dodecanoate (laurate), NaL, and sodium tetradecanoate (myristate), NaMy, solutions is measured as a function of the surfactant concentrations at 25 degrees C, and at several fixed NaCl concentrations. Surface tension isotherms are also obtained. Depending on the surfactant concentration, the investigated solutions contain precipitates of alkanoic acid, neutral soap, and...

[Soap].

Prediction of Surface Tension in Single and Mixed Electrolyte Solutions

Surface tensions and surface potentials of acid solutions

A theory is presented which allows us to quantitatively calculate the excess surface tension of acid solutions. The H, in the form of hydronium ion, is found to be strongly adsorbed to the solution-air interface. To account for the electrostatic potential difference measured experimentally, it is necessary to assume that the hydronium ion is oriented with its hydrogens pointing into the bulk wa...

Surface tensions and surface potentials of acid solutions.

A theory is presented which allows us to quantitatively calculate the excess surface tension of acid solutions. The H(+), in the form of hydronium ion, is found to be strongly adsorbed to the solution-air interface. To account for the electrostatic potential difference measured experimentally, it is necessary to assume that the hydronium ion is oriented with its hydrogens pointing into the bulk...