Cacid = 0.2 M(40.07 g/dm3)

Cacid = 0.5 M(100.17 g/dm3)

(mol /dm3 )


( mol /dm3 )

D'

%E

pH

(mol /dm3 )

(mol /dm3 )

D'

%E

pH

0.067

2.43

0.03

2.7

3.86

0.205

2.23

0.09

8.2

3.46

0.10

2.40

0.04

4.0

3.88

0.393

2.11

0.19

15.7

3.55

0.132

2.37

0.06

5.3

3.89

0.467

2.03

0.23

18.7

3.58

0.136

2.36

0.06

5.4

3.90

0.629

1.87

0.34

25.2

3.63

0.150

2.35

0.06

6.0

3.91

0.735

1.77

0.42

29.4

3.66

0.199

2.30

0.09

8.0

3.93

0.889

1.61

0.55

35.5

3.70

0.216

2.28

0.09

8.6

3.96

1.20

1.30

0.92

48.0

3.78

0.381

2.12

0.18

15.2

3.98

1.51

0.996

1.51

60.2

3.86

0.724

1.78

0.41

29.0

4.09

1.74

0.763

2.28

69.5

3.93

0.934

1.57

0.60

37.4

4.15

1.82

0.676

2.70

73.0

3.96

1.10

1.41

0.78

43.8

4.20

1.95

0.551

3.54

78.0

4.02

1.41

1.09

1.29

56.4

4.31

2.01

0.493

4.08

80.4

4.04

1.59

0.908

1.80

63.7

4.36

2.10

0.401

5.24

84.0

4.09

1.69

0.807

2.10

67.6

4.40

2.23

0.274

8.12

89.0

4.18

1.89

0.614

3.07

75.4

4.49

2.47

0.033

73.9

98.7

4.65

2.35

0.152

15.4

93.9

4.81

0.25

0.003

874

99.5

5.19

Table 6: Equilibrium data of (CuSO4 + lauric acid + benzene) at 298.2 K. Ccu,initial = 2.510-2 M (1.5886 g/dm3) , CNa2SO4 = 0.1 M (14.204 g/dm3).