Table II.
Ionic composition (in mm) of bath solutions in which Cl− was varied by decreasing the NaCl concentration (as indicated by the ND suffix)
The Al concentrations used to maintain a constant Al3+ activity of 10 μm through the solutions are indicated in the fourth column. The fifth column indicates the predicted Cl− activity ({Cl−}o). Ionic activities were calculated using the GEOCHEM speciation program. All solutions contained 1 mm KCl, 1.8 mm CaCl2, and 0.1 mm LaCl3 in the background. The osmolarity of all solutions was adjusted to 195 mosmol with sorbitol, and the pH was adjusted to 4.5.
| Solution | Ionic Composition
|
|||
|---|---|---|---|---|
| Na+ | Cl− | AlCl3 | {Cl−}o | |
| ND96 | 96 | 101 | 0.10 | 75 |
| ND72 | 72 | 77 | 0.08 | 59 |
| ND48 | 48 | 53 | 0.06 | 41 |
| ND24 | 24 | 29 | 0.05 | 24 |
| ND15 | 15 | 20 | 0.04 | 14 |
| ND0 | 0 | 5 | 0.02 | 5 |