ESTIMATION OF LIMITING EQUIVALENT CONDUCTIVITY AND IONIC RADIUS OF TETRABORATE ANION FROM CONDUCTIVITY MEASUREMENTS OF CONCENTRATED TETRABORATE SOLUTIONS

Abstract

The conductivities of aqueous solutions of sodium sulphate and sodium tetraborate at different concentrations were measured. Using a novel method, these data were used to determine the limiting equivalent ionic conductivity and ionic radius of tetraborate ion. It was found that the limiting equivalent ionic conductivity of tetraborate ion is 34.58 ohm⁻¹ cm² and the ionic radius of tetraborate is 3.507±0.076 Å.

Keywords:

• Equivalent conductivity
• Ionic radius
• Kohlrausch equation
• Limiting equivalent ionic conductivity
• Stokes law
• Tetraborate anion
• Walden's rule

Acknowledgments

I would like to thank H. Yildiran for his suggesting of the original idea at the beginning of the study and S. Astley and N. Ertas from Ege University, Izmir for their helpful comments.

Notes

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