Table 4.

Overall^a equilibrium constants of the M²⁺/NAC²⁻ species in NaCl_(aq) in the molar concentration scale at T = 298.15 K and at p = 0.1 MPa.

I/mol dm−3	CaL0(aq)	CaHL+	CaL22−
0.098	1.36 ± 0.04b	10.22 ± 0.03b	3.82 ± 0.02b
0.135	1.29 ± 0.03	10.16 ± 0.03	3.75 ± 0.02
0.485	1.13 ± 0.02	10.04 ± 0.04	3.64 ± 0.03
0.736	1.17 ± 0.04	10.12 ± 0.06	3.71 ± 0.05
0.960	1.25 ± 0.06	10.22 ± 0.07	3.82 ± 0.07

I/mol dm−3	MgL0(aq)	MgHL+
0.113	2.05 ± 0.02	11.38 ± 0.02
0.148	2.01 ± 0.02	11.34 ± 0.02
0.385	1.93 ± 0.02	11.31 ± 0.01
0.854	2.13 ± 0.06	11.61 ± 0.06
1.052	2.26 ± 0.07	11.78 ± 0.09

I/mol dm−3	ZnL0(aq)	ZnLH+	ZnL(OH)−	ZnL22−	ZnL2(OH)3−	ZnL34−
0.134	5.58 ± 0.04	11.28 ± 0.07	−2.96 ± 0.15	11.22 ± 0.03	1.42 ± 0.05	14.87 ± 0.09
0.495	5.59 ± 0.05	11.04 ± 0.09	−2.99 ± 0.19	11.09 ± 0.03	1.47 ± 0.06	14.81 ± 0.12
0.742	5.76 ± 0.05	11.03 ± 0.11	−2.89 ± 0.22	11.15 ± 0.04	1.55 ± 0.07	14.77 ± 0.14
1.057	6.03 ± 0.07	11.08 ± 0.14	−2.72 ± 0.28	11.30 ± 0.05	1.66 ± 0.09	14.71 ± 0.18

^alog β_MHiL values refer to Eq. (1b).

^b95% Confidence interval; standard uncertainties u are: u(c) = 0.001 mol dm⁻³, u(T) = 0.1 K, u(p) = 1 kPa.