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Citation: LI Yu, ZHU Jin-Hua, RAO Qiu-Hua, SONG Yu-Su, ZHOU Zi-Long, ZHENG Yang. Solubility Product Determination ofA2BType Insoluble Salts by theActivity Coefficient Method: TakingAg₂SO₄ as an Example[J]. University Chemistry, ;2016, 31(10): 68-73. doi: 10.3866/PKU.DXHX201601035 shu

Solubility Product Determination ofA2BType Insoluble Salts by theActivity Coefficient Method: TakingAg₂SO₄ as an Example

College of Science, Naval University of Engineering, Wuhan 430033, P. R. China

Taking the assumption that activity of silver ion and sulfate ion of very low concentration is constant in any aqueous solution,the primary cell was designed for the cell reaction of Ag₂SO₄(s)→2Ag⁺(aq)+SO₄^2-(aq).The compensation method was used to obtain the electromotive force of the primary cell when the concentrations of AgNO₃ and K₂SO₄ changed.The relationship between electromotive force and the mean activity coefficients of electrolytes as well as the solution concentration was deduced according to the Nernst equation and the limit Debye-Huckel formula.Standard electromotive force E ^⊖ was obtained by extrapolation.Finally,the solubility product of silver sulfate was calculated through the relationship between equilibrium constant and electromotive force of the primary cell.
- The activity coefficient method,
- Primary cell,
- Solubility product
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Solubility Product Determination ofA2BType Insoluble Salts by theActivity Coefficient Method: TakingAg2SO4 as an Example

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通讯作者: 陈斌, bchen63@163.com

Solubility Product Determination ofA2BType Insoluble Salts by theActivity Coefficient Method: TakingAg₂SO₄ as an Example