Mean Activity Coefficients Measurements of KCl in “ KCl + H2O + Serine” Electrolyte System and Thermodynamics Investigation

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ASADI ZEINAB; BAGHERINIA MOHAMMAD ALI

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Journal: Nashrieh Shimi va Mohandesi Shimi Iran Year:2018 | Volume:37 | Issue:1 Page(s): 167-176

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Title

Mean Activity Coefficients Measurements of KCl in “ KCl + H2O + Serine” Electrolyte System and Thermodynamics Investigation

Author(s)

ASADI ZEINAB | BAGHERINIA MOHAMMAD ALI | Issue Writer Certificate

Keywords

Mean activity coefficientsQ1

Potentiometric methodQ1

Pitzer ion-interaction modelQ1

Thermodynamic propertiesQ1

Abstract

In this research, ternary electrolyte system “ KCl + H2O + Serine” was investigated as thermodynamics aspect and based on Pitzer ion-interaction model. For this reason, determination of Mean activity coefficients was performed by a Potentiometric method and using galvanic cell without a liquid junction. The galvanic cell used was type as K+-ISE | KCl (m), Serine (%wt. ), H2O (100-%wt. ) | AgCl-Ag and the ion selective electrodes used were potassium ion selective electrode based on PVC and Ag-AgCl electrode that both of them were created in our laboratory. Measurements were carried out at T = 298 K and ionic strength range from 0. 0017 to 2. 5 molal for different percentage mass fraction of serine (%wt. = 0, 2, 4, 8 and 10) in solution. Thermodynamic investigations were performed by correlation of experimental potentiometric data with Pitzer ion-interaction model. In this work, by determination of Mean activity coefficients of KCl electrolyte and comparison of them with the calculated amounts by Pitzer ion-interaction model, the application of the pair electrodes was investigated. Then, by correlation of Mean activity coefficients determined with the mode, the adjustable Pitzer parameters (β o, β 1, and CØ ) were determined. In the long run, Thermodynamic properties such as osmotic coefficient (Ø ) and excess Gibbs free energy (GE) were calculated by using the adjustable parameters based on Pitzer ion-interaction model. The results showed that the Pitzer ion-interaction model was successfully for a description of the investigated system.

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APA: Copy

ASADI, ZEINAB, & BAGHERINIA, MOHAMMAD ALI. (2018). Mean Activity Coefficients Measurements of KCl in “ KCl + H2O + Serine” Electrolyte System and Thermodynamics Investigation. NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), 37(1 ), 167-176. SID. https://sid.ir/paper/26112/en

Vancouver: Copy

ASADI ZEINAB, BAGHERINIA MOHAMMAD ALI. Mean Activity Coefficients Measurements of KCl in “ KCl + H2O + Serine” Electrolyte System and Thermodynamics Investigation. NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN)[Internet]. 2018;37(1 ):167-176. Available from: https://sid.ir/paper/26112/en

IEEE: Copy

ZEINAB ASADI, and MOHAMMAD ALI BAGHERINIA, “Mean Activity Coefficients Measurements of KCl in “ KCl + H2O + Serine” Electrolyte System and Thermodynamics Investigation,” NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), vol. 37, no. 1 , pp. 167–176, 2018, [Online]. Available: https://sid.ir/paper/26112/en

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