Complex Formation in a Liquid-Liquid Extraction System Containing Cobalt(II), 4-(2-Pyridylazo)resorcinol, and Nitron

Table 2

Calculated values of Log 𝛽, Log 𝐾_𝐷, Log 𝐾_ex, and R%.

Equilibrium	Equilibrium constant	Value
(1)	𝛽=[(NtH)[Co(PAR)2]]/[NtH^+]×[Co(PAR)2^−]	Log 𝛽=4.7±0.3^a
		Log 𝛽=4.77±0.06^b
		Log 𝛽=4.9±0.1^c
(2)	𝐾𝐷=(NtH)Co(PAR)2org/(NtH)Co(PAR)2aq	Log 𝐾𝐷=1.34±0.01
(3)	𝐾ex=(NtH)Co(PAR)2org/NtH^+aq×Co(PAR)2^−aq	Log 𝐾ex=6.11±0.07^d

^aCalculated by the mobile equilibrium method [40].
^bCalculated by the Holme-Langmihr method [41].
^cCalculated by the Harvey-Manning method [42].
^dCalculated by the formula 𝐾_ex=𝐾_𝐷×𝛽, where 𝛽 is determined by the Holme-Langmihr method.