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c(Na2SO4)/ mol-L 0.001 0.01 0.02 0.04 0.1000.200 S(PbSO4)/ mmolL 0.15 0.024 0.0160.014 0.013 0.016 0.023 ①when c.(SO)<0.04molL,c(S0)↑, S(PbSO),common ion effect is predominant(同离子效应占主导): ②when c.(S0)>0.04 molLc(S0)个, S(PbSO)T slightly,salt effect is predominant 效应占主导)。 ①when , , S(PbSO4 ),common ion effect is predominant(同离子效应占主导); 2 1 o (SO4 ) 0.04molL - - c <  (SO ) 2 4 - c ② when , , S(PbSO4 ) slightly,salt effect is predominant (盐 效应占主导)。 2 1 o (SO4 ) 0.04molL - - c >  (SO ) 2 4 - c c(Na2SO4)/ molL -1 0 0.001 0.01 0.02 0.04 0.100 0. 200 S(PbSO4)/ mmolL -1 0.15 0.024 0.016 0.014 0.013 0.016 0.023
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