Abstract
Potentials for the cell without liquid junction\(H_2 ,Pt\backslash B(OH)_3 (m_1 ), MB(OH)_4 (m_2 ), MCl(m_3 )\backslash AgClAg\) where M is sodium or potassium are reported over a range of ionic strength to I=3 mol-kg−1 at 5 to 55°C. Total boron concentration in the solutions was restricted to low levels to minimize formation of polynuclear boron species. Cell potentials are treated with the Pitzer ion interaction treatment for mixed electrolytes, with linear ionic strength dependence assumed for the activity coefficient of undissociated boric acid. Trace activity coefficients of sodium and potassium borates in chloride media are calculated at various temperatures.
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