80 H2SO4 60 KOH KCI E40 20 MESO4 0 0 1015 c/(mold 3) Conductivity vs concentration
6 演示
Chical chemistr Elcctrochemiary Molar conductivity In an extensive series of measurements during 19th century, Friedrich Kohlrausch The limiting molar conductivity At low concentrations 400 A=A-K 300 The infinite-dilute molar conductivity A++A=vn+vn 200 100 AgNO The infinite-dilute molar conductivity of the cations and anions CHCOOH Law of the independent migration of ions 0.5 1.5
7 400 300 200 100 3 B/mol dm− c m/(Scm 2 mol -1 ) HCl NaOH AgNO3 CH3COOH 0 0.5 1.0 1.5 In an extensive series of measurements during 19th century, Friedrich Kohlrausch At low concentrations + + − − = + + − = + m m m The infinite-dilute molar conductivity K c m = m − The infinite-dilute molar conductivity of the cations and anions Law of the independent migration of ions Molar Conductivity Physical Chemistry o m The limiting molar conductivity Electrochemistry
400 HCI 300 NOH 200 10 AgNO3 CH3COOTT 0.5 1.5旗垂 cIwol-dei 厦门大学化学化工学院
8 演示
摩尔电导率与浓度的关系 由于溶液中导电物质的量已给定,都为lmol, 所以,当浓度降低时,粒子之间相互作用减弱,正、 负离子迁移速率加快,溶液的摩尔电导率必定升高。 但不同的电解质,摩尔电导率随浓度降低而升高的 程度也大不相同
9 摩尔电导率与浓度的关系 由于溶液中导电物质的量已给定，都为1mol， 所以，当浓度降低时，粒子之间相互作用减弱，正、 负离子迁移速率加快，溶液的摩尔电导率必定升高。 但不同的电解质，摩尔电导率随浓度降低而升高的 程度也大不相同
ectrochemid四 c/(mol·dm) 0.0010.0050.010.02 0.05 0.045 H CI 0.040 0.035 0.030 sO 0.025 0.015 KCI LaCI 0.010 Na. SOa 0.005 CH:COONE CHICOOH 0.050.100.150.200.25
10 o m Electrochemistry