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STUDY OF HYDROLYSIS AND COMPLEXING OF URANYL IONS IN SULFATE SOLUTIONS AT ELEVATED TEMPERATURES.

N. M. Nikolaeva

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Abstract

A study was made of uranyl ion hydrolysis at elevated temperatures in the absence of complex formation in dilute nitrate solutions by measuring the pH. It was found that hydrolysis in the temperature range from 50 to 150/sup 0/C and a total U(VI) concentration of 10/sup -2/ to 10/sup -5/ M occurs basically by the three reactions. The data was processed by computer to calculate the equilibrium constants of these reactions and to obtain equations for these constants as functions of temperature. Taking into account hydrolysis, the pH measurements for the uranyl sulfate solutions were used to calculate the equilibrium constants of the dissociation reaction of the sulfate complex. The dissociation constants as functions of temperature were also found. 22 refs., 3 tabs.

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A study was made of uranyl ion hydrolysis at elevated temperatures in the absence of complex formation in dilute nitrate solutions by measuring the pH. It was found that hydrolysis in the temperature range from 50 to 150/sup 0/C and a total U(VI) concentration of 10/sup -2/ to 10/sup -5/ M occurs basically by the three reactions. The data was processed by computer to calculate the equilibrium constants of these reactions and to obtain equations for these constants as functions of temperature. Taking into account hydrolysis, the pH measurements for the uranyl sulfate solutions were used to calculate the equilibrium constants of the dissociation reaction of the sulfate complex. The dissociation constants as functions of temperature were also found. 22 refs., 3 tabs.

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Available abstract

A study was made of uranyl ion hydrolysis at elevated temperatures in the absence of complex formation in dilute nitrate solutions by measuring the pH. It was found that hydrolysis in the temperature range from 50 to 150/sup 0/C and a total U(VI) concentration of 10/sup -2/ to 10/sup -5/ M occurs basically by the three reactions. The data was processed by computer to calculate the equilibrium constants of these reactions and to obtain equations for these constants as functions of temperature. Taking into account hydrolysis, the pH measurements for the uranyl sulfate solutions were used to calculate the equilibrium constants of the dissociation reaction of the sulfate complex. The dissociation constants as functions of temperature were also found. 22 refs., 3 tabs.

Key concepts: Uranyl, Sulfate, Hydrolysis, Ion, Inorganic chemistry, Chemistry, Biochemistry, Organic chemistry

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STUDY OF HYDROLYSIS AND COMPLEXING OF URANYL IONS IN SULFATE SOLUTIONS AT ELEVATED TEMPERATURES. — Research Paper | ScholarLens