金属离子沉淀PH值表格(20℃)
金属离子浓度10^-110^-210^-310^-410^-5pKsp
沉淀PHIn3.273.63.934.264.5933.2
Sn(二价离子)0.571.071.572.072.5727.8
Sn(四价离子)0.250.50.7511.2556
Cd7.78.28.79.29.713.6
Pb(二价离子)7.047.548.048.549.0414.9
Pb(四价离子)-------------1.1365.53
Tl-0.270.060.390.721.0543.8
Fe(二价离子)77.58.08.59.015.1
Fe(三价离子)1.92.22.52.93.237.4
Co(二价离子)7.157.658.158.659.1514.7
Co(三价离子)-0.230.10.430.761.0943.7
Al3.43.74.04.44.732.88
Cr4.34.64.95.35.630.2
Cu4.75.25.76.26.719.6
Ni7.27.78.28.79.214.7
Mn8.18.69.19.610.112.73
Mg9.19.610.110.611.110.74
Zn6.046.547.047.548.0416.92
Sb0.530.861.191.521.8541.4
Ti11.331.6622.3340
Bi4.204.534.865.195.5230.4
“--”代表数值很大,生产工艺中不可能存在,未用括号标出价态的离子是正常价态。此表的显著的作用是:从其中Sn(二价离子)、Sn(四价离子)沉淀的PH数据,我们可以找到方法选择合适的PH将两种粒子分开,粗铟生产中除锡工艺就是利用这个原理。