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在恒定总离子强度下,测定了无液接电池Pt,H_2(1 atm)|HCl(m_A),NiCl_2(m_B),H_O|AgCl-Ag(A)的电动势.总离子强度I从0.5到5.0mol·kg~(-1),温度为5～45℃.mA和m_B分别为混合物中HCl和NiCl_2的质量摩尔浓度.混合物中HCl的活度系数γA按下式计算:
The electromotive force of Pt, H_2 (1 atm) | HCl (m_A), NiCl_2 (m_B) and H_O | AgCl-Ag (A) was measured at constant total ionic strength.The total ionic strength I was from 0.5 to 5.0 mol · kg -1 and the temperature is 5 ~ 45 ° C. mA and m_B are respectively the mass molar concentrations of HCl and NiCl 2 in the mixture.The activity coefficient γA of HCl in the mixture is calculated as follows: