C cu,initial
(mol-g/dm3)

Log D'- log [Cu] versus pH

C acid=0.2 M

  

C acid=0.5 M

a

b

R2

  

a

b

R2

5.0

3.9884

-15.460

0.9984

  

3.971

-13.907

0.9997

2.5

3.5625

-13.412

0.9294

  

4.0632

-14.070

0.9999

5.0

3.9939

-14.976

0.9996

  

3.5488

-11.741

0.9906

2.5

4.0035

-15.180

0.9907

  

3.9927

-13.227

0.9999
Table 2: Parameter correlation equilibrium data for extraction of Cu(II) with using lauric acid diluted in benzene at 298.2 K.