Abstract
Solubility data for potassium dichromate in dilute aqueous ethanol solutions were determined at five temperatures (283, 288, 293, 298, and 303) K. The densities of the saturated solutions were also measured. The solubility data (283, 288, 293, and 298) K correlated well with the empirical equation ln x1 = A + Bx2 + Cx22 with an precision of ±1.5% where x1 and x2 are the mole fraction of potassium dichromate and ethanol in salt-saturated solutions and A, B, and C are fitted empirical constants depending on the temperature. The results indicate that at ambient temperatures of about 283 to 303 K, addition of less than 0.01 mass fraction of ethanol to an aqueous saturated solution of potassium dichromate caused “salting out” in the range between 33 and 43% of the mass of the salt.
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