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THE EFFECT OF IONIC STRENGTH ON THE ACID – BASE PROPERTIES OF GLYCINE IN AN AQUEOUS SOLUTION

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UDC: 577.323.22 + 577.112.382.2 + 621.78.063            https://doi.org/10.62965/tnu.sns.2024.1.15

 

Eshova Gulrukhsor Bobonazarovna

Tajik National University

 

The processes of glycine ionization (Gly) have been studied by potentiometry and the values of pKa1 and pKa2 at 288.15 K, the ionic strength of the solution (Na(H)CIO4) have been calculated) 0.1, 0.25, 0.5, 0.75, 1.0 mol/l and concentrations 1.0÷3.0 · 10-3 mol/l with a confidence probability of P = 0.95.

With an increase in ionic strength and temperature, the pK of both amino and carboxyl groups and functional groups of the side radical decreases, which indicates an increase in the degree of their ionization and is consistent with the theory of weak electrolytes.

 

Keywords: Potentiometry, glycine, concentration, ionization constants, ionic strength, pH, zwitter ion.

 

Information about the author

 

Eshova Chaykhana Bobonazarovna- Tajik National University,

Candidate of Chemical Sciences, senior researcher of the Scientific Research Institute.

Address 734025, Dushanbe, Republic of Tajikistan, 17 Rudaki Avenue.

Phone: (+992) 918-23-01-82.

E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

REVIEWER: Mabatkadamzoda K.S., Doctor of Chemical Sciences

 

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Article received: 06.12.2023

Approved after review: 08.01.2024

Accepted for publication: 27.02.2024

   
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