ISSN:
1572-8927
Schlagwort(e):
Activity coefficients
;
emf measurements
;
ternary systems
;
NaCl + Na2SO4
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract Activity coefficients for sodium chloride in the NaCl + Na2SO4 + H2O ternary system were determined from emf measurements of the cell $${\text{Na}} - {\text{glass|NaCl}}\left( {m_{\text{A}} } \right),\;{\text{Na}}_{\text{2}} {\text{SO}}_{\text{4}} \left( {m_{\text{B}} } \right),\;{\text{AgCl}}\left( {\text{s}} \right){\text{|Ag}}$$ at 15, 25, 35, and 45°C and at total ionic strengths from 0.1 to 6 mol-kg−1. These activity coefficient were analyzed by using the Harned rule and the treatments of Scatchard–Rush–Johnson and Pitzer. The analysis of activity coefficients at “trace” concentration was also achieved and qualitatively interpreted by considering the ionic interactions that can take place in the mixed system. Finally, the excess Gibbs energy of the mixtures was calculated and qualitatively analyzed against the composition of the system.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1021780414613
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