Thermochemistry is the study of the energy changes which occur during a chemi-cal reaction. For example, in the hydrolytic polymerization of Cr, Cr[Cr（OH）],Cr[Cr（OH）]and Cr[Cr（OH）]were formed at concentration ra...Thermochemistry is the study of the energy changes which occur during a chemi-cal reaction. For example, in the hydrolytic polymerization of Cr, Cr[Cr（OH）],Cr[Cr（OH）]and Cr[Cr（OH）]were formed at concentration range of 0.005-0.04展开更多
Experimental data of hydrolytic polymerization of lanthanide ions in aqueous solution were treated by graphic method,computer fitting and pq analysis,species present were ascertained and hydrolysis constants obtained....Experimental data of hydrolytic polymerization of lanthanide ions in aqueous solution were treated by graphic method,computer fitting and pq analysis,species present were ascertained and hydrolysis constants obtained.Ln(OH)^(2+)and Ln_2(OH)_2^(4+)predominated in the species of all hydroly- sis products.When the first and the second hydrolysis constants were plotted against radii and ef- fective nuclear charge of lanthanide ions,the curves obtained conformed with the“three-division groups”rule.Correlation between hydrolysis constants of Ln_2(OH)_2^(4+)and other hydrolysis constants is linear. Using the above empirical correlations we calculated hydrolysis constants of all lanthanide ions and obtained satisfactory results which showed good regularity for hydrolysis of lanthanide ions and thus systematized all data of the reaction.展开更多
基金Project supported by the Natural Science Foundation of Shandong Province.
文摘Thermochemistry is the study of the energy changes which occur during a chemi-cal reaction. For example, in the hydrolytic polymerization of Cr, Cr[Cr（OH）],Cr[Cr（OH）]and Cr[Cr（OH）]were formed at concentration range of 0.005-0.04
基金This work was supported by the National Natural Science Foundat ion of China.
文摘Experimental data of hydrolytic polymerization of lanthanide ions in aqueous solution were treated by graphic method,computer fitting and pq analysis,species present were ascertained and hydrolysis constants obtained.Ln(OH)^(2+)and Ln_2(OH)_2^(4+)predominated in the species of all hydroly- sis products.When the first and the second hydrolysis constants were plotted against radii and ef- fective nuclear charge of lanthanide ions,the curves obtained conformed with the“three-division groups”rule.Correlation between hydrolysis constants of Ln_2(OH)_2^(4+)and other hydrolysis constants is linear. Using the above empirical correlations we calculated hydrolysis constants of all lanthanide ions and obtained satisfactory results which showed good regularity for hydrolysis of lanthanide ions and thus systematized all data of the reaction.
