The hydrolysis of metal ions. Part 3. Lead(II)

Abstract

The hydrolysis of lead(II) has been investigated by potentiometric titration at 25 °C in 0.10 mol dm^–3 K[NO₃]. Data treatment by our version of MINIQUAD indicates the formation of the species [Pb(OH)]⁺, [Pb₃(OH)₄]²⁺, [Pb₃(OH)₅]⁺, [Pb₄(OH)₄]⁴⁺, and [Pb₆(OH)₈]⁴⁺; the –log β_pq values for these species are estimated to be 7.86 (0.006), 23.91 (0.02), 31.75(0.02), 20.40 (0.004), and 43.38 (0.009), respectively, the estimated standard deviations being given in parentheses. The use of low concentrations of total lead (1.000 × 10^–4– 2.008 × 10^–3 mol dm^–3) does not prevent the detection of high polymers and aids the detection of the new species [Pb₃(OH)₅]⁺.