Abstract
The electromotive force of HCl−Na2SO4 solutions has been determined from 5 to 50°C and ionic strengths from 0.5 to 6m with a Harned type cell\(Pt; H_2 (g, 1 atm)|HCl(m_1 ) + Na_2 SO_4 (m_2 )|AgCl, Ag\) The results have been used to determine the activity coefficient of HCl in the mixtures. The activity coefficiencts have been analyzed with the Pitzer equations to account for the ionic interactions. The measurements were used to determine interaction coefficients (β0, β1) for NaHSO4 solutions from 5 to 50°C. The model represents the mean activity coefficients HCl in the mixtures to ±0.005 over the entire temperature and concentration range of the measurements. The results have been combined with literature data to provide parameters that are valid from 0 to 250°C for NaHSO4 solutions.
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Pierrot, D., Millero, F.J., Roy, L.N. et al. The activity coefficiencts of HCl in HCl−Na2SO4 solutions from 0 to 50°C and ionic strengths up to 6 molal. J Solution Chem 26, 31–45 (1997). https://doi.org/10.1007/BF02439442
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DOI: https://doi.org/10.1007/BF02439442