| Concentration and volume of HCl | Pb(II) R% | |
| 0.2 М | 10 ml | 90 |
|
| 5 ml | 86 |
| 0.5 М | 10 ml | 98 |
|
| 5 ml | 99 |
| 1.0 М | 10 ml | 96 |
|
| 5 ml | 100 |
| 2.0 М | 10 ml | 96 |
|
| 5 ml | 96 |