6.3 Equilibria between two precipitates 6.3.1 Fractional precipitation (分步沉淀) 6.3.2 The conversion of various precipitates (沉淀的转化) §6.3 Equilibria between two precipitates 6.3.2 The conversion of various precipitates (沉淀的转化) 6.3.1 Fractional precipitation (分步沉淀)