Cacid = 0.2 M (40.07 g/dm3)

Cacid = 0.5 M (100.17 g/dm3)


(mol-g /dm3 )


( mol-g /dm3 )

D'

%E

pH


(mol-g /dm3 )


( mol-g /dm3 )

D'

%E

pH

0.310

2.19

0.14

12.4

4.26

0.171

2.33

0.07

6.8

3.83

0.454

2.05

0.22

18.2

4.31

0.419

2.08

0.20

16.8

3.95

0.638

1.86

0.34

25.5

4.36

0.790

1.71

0.32

31.6

4.02

0.691

1.81

0.38

27.6

4.39

0.945

1.56

0.61

37.8

4.10

0.974

1.53

0.64

39.0

4.46

0.122

1.28

0.96

48.9

4.17

1.03

1.47

0.89

41.2

4.50

0.172

0.784

2.19

68.7

4.31

1.40

1.10

1.28

56.1

4.56

0.191

0.587

3.26

76.5

4.38

1.85

6.52

2.83

73.9

4.71

2.05

0.447

4.60

82.1

4.45

2.25

2.52

8.91

89.9

4.94

2.09

0.412

5.07

83.5

4.47

2.48

0.02

123

99.2

5.54

2.15

0.353

6.08

85.9

4.51

Table 4: Equilibrium data of (CuSO4 + lauric acid + benzene) at 298.2 K. Ccu,initial = 2.5×10-3 M (0.1589 g/dm3) , CNa2SO4 = 0.1 M (14.204 g/dm3).