Conductivity Properties of Selected Aliphatic Monocarboxylic Acid Anions in Water at 298.15 K

Abstract

The article presents the electric conductivity values of sodium salts of four selected monocarboxylic acid derivatives in aqueous solution: those with a chlorine substituent in the peripheral position, i.e. ClCH(CH2)nCOOH; those with a bromine substituent in the peripheral position, i.e. BrCH(CH2)nCOOH; as well as unsaturated sodium salts with a double bond in the peripheral position, i.e. CH2=CH(CH2)nCOOH; and unsaturated sodium salts with a double bond in the second position, i.e. CH3-CH=CH(CH2)nCOOH. All conductivity measurements were performed at 298.15 K in the concentration range of 0.0005 < c / mol ∙ dm-3 < 0.018. The obtained values allowed the limiting molar conductivities ( 0  m ) of the studied electrolytes to be determined using the Fuoss-Justice equation. Based on these ( 0  m ) values, the molar limiting conductivity values ( ) for individual anions of the tested electrolytes were calculated and analyzed as a function of carbon chain length. The work also examines the effect of substituent type (Cl or Br) and double bond location on the limiting molar conductivity values of the tested monocarboxylic acid anions and compares them with literature values.