Tube A
0 mL
Tube B
0 mL
Tube C
0 mL
Tube D
0 mL
Tube A
Tube B
Tube C
Tube D
Observation Table
| Tube | pH Range | Observation |
|---|---|---|
| A | - | - |
| B | - | - |
| C | - | - |
| D | - | - |