## Abstract

The emf of the cell without liquid junction (A) was used to study the HCl + ThCl_{4} + H_{2}O mixed electrolyte system. The Pt, H_{2}(g,1 atm)|HCl(m_{A}), ThCl_{4}(m_{B})|AgCl,Ag (A) emf was measured for solutions at constant total ionic strengths of 0.006, 0.008, 0.01, 0.05, 0.1, 0.25, 0.5, 1.0, 2.0, and 3.0 mol·kg^{-1} and at temperatures ranging from 5 to 55°C. The mean activity coefficients of HCl in the mixtures were calculated using the Nernst equation. Two detailed treatments are given of the data for 25°C. In the first, the Harned equations were fitted to the activity coefficient data using least-squares regression techniques. Results show that the quadratic equation is adequate for the full range of Y_{B} to 0.9 for I ≤ 2.0 mol·kg^{-1} but only for smaller Y_{B} at I = 3.0. Second, an ion-interaction (Pitzer) equation treatment is given in which experimental isopiestic measurements, solubility, and the activity coefficient data are analyzed and the necessary parameters developed for the H^{+}-Th^{4+}-Cl^{-}-H_{2}O system.

Original language | English (US) |
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Pages (from-to) | 11065-11072 |

Number of pages | 8 |

Journal | Journal of physical chemistry |

Volume | 96 |

Issue number | 26 |

DOIs | |

State | Published - 1992 |

Externally published | Yes |

## ASJC Scopus subject areas

- Engineering(all)
- Physical and Theoretical Chemistry