物理化学下册复习

= (2 × 70+2 × 79.8) × 10 ?4 S ? m 2 ? mol ?1 =299.6 × 10 ?4 S?m 2 ? mol ?1 ???????? 224 24/ SO Pb PbSO sp ??cccΚ???求得 PbSO 4的溶解度: c = c (Pb 2+ ) = c (SO 4 2- )= ??cK SP = 1.26 × 10 ? 4 mol ? dm ?3 饱和溶液的电导率: κ(溶液) = κ(PbSO 4 ) + κ(H 2 O) = (37.9+1.6) × 10 ? 4 S ? m ?1 =39.5 × 10 ? 4 S ? m ?1 PbSO 4的电导率: ???? cΛκ PbSO PbSO 4m 4 ??=299.6 × 10 ?4× 1.26 × 10 ?4× 10 3 S ? m ?1 =37.90 × 10 ? 4 S ? m ?1 8. 平均活度和平均活度系数定义: 1+ def = ( ) a a a ???? ??? ??????离子平均活度( mean activity of ions ) 1 def ( ) ???? ??? ????离子平均活度系数( mean activity coefficient of ions ) 1 def ( ) b b b ???? ????离子平均质量摩尔浓度( mean molality of ions ) B a a a a ???? ????? ??????m m a???)( ????m m