SOLUBILITY OF POTASSIUM DICHROMATE IN DILUTE AQUEOUS-METHANOL AND 2-PROPANOL SOLUTIONS IN THE TEMPERATURE-RANGE 283 K TO 303 K

Solubility data for potassium dichromate in dilute aqueous methanol an d 2-propanol solutions and the densities of the saturated solutions at the equilibrium temperature were determined at five temperatures (283 , 288, 293, 298, and 303) K. The solubility data were correlated with the empirical equation In x(1) = A + Bx(i) at temperatures (283, 288, 293, and 298)K and In x(1) = A + Bx(i) + Cx(i)(2) at 303 K, where x(1) are the mole fraction of potassium dichromate and x(i) the mole fract ion of methanol or 2-propanol in salt-saturated solutions and A, B, an d C are fitted empirical constants depending on the temperature. The p recision of the fitted correlations are less than +/-0.7% for both met hanol and 2-propanol aqueous systems.