No abstract

No abstract

columns were analyzed grav¡metrically using. 2 -mercaptobenzothiazole (2) (Table I). Preliminary experiments of a similar kind had shown the necessity of leaching the ignited iridium precipitate in boiling 1 to 1 hydrochloric acid, prior to reduction in hydrogen, to eliminate contaminants that follow iridium through the cation exchange columns. This problem has been noted by Tertipis and Beamish (11).

HYDROGEN SULFIDE AND SILVER 885 than for sodium salts. The free energy differences of the reaction when potassium is substituted for sodium, or chloride for nitrate, are sensibly linear functions of the concentration of added neutral salt for 1, 2 and 3 molar additions.3. Although all the ions involved are of negative sign, the shift in equilibrium does not follow the principle of specific interaction at these high concentrations.4. For solutions of constant thermodynamic environment, A" (triiodide formation neglected) is not constant when I~is varied, whereas K'e (tri-iodide considered) is constant. This furnishes additional evidence for the existence of tri-iodides in solution.5. The shift in equilibrium on changing the cation from potassium to sodium is in qualitative agreement with the measurements of the greater velocity of the forward reaction in the presence of potassium ions. New York City

No abstract