Abstract

Abstract Calcium arsenate dihydrate is precipitated at pH 7.0 and its dissolution in aqueous solutions at temperatures of 35, 40, 45 and 50°C and a pH of between 3.0 and 8.0 is investigated. The thermodynamic parameters ΔG0, ΔS0 and ΔH0 for the process are evaluated. Temperature dependence of solubility is obtained by the equations −log KTCA = 9078.138 T − 34.0468 + 0.0821421 T

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