| 
 pH  | 
 0.2mol/L Tris(ml)  | 
 0.2mol/L HCl(ml)  | 
 H2O  | 
| 
 7.19  | 
 10.0  | 
 18.0  | 
 12.0  | 
| 
 7.36  | 
 10.0  | 
 17.0  | 
 13.0  | 
| 
 7.54  | 
 10.0  | 
 16.0  | 
 14.0  | 
| 
 7.66  | 
 10.0  | 
 14.0  | 
 15.0  | 
| 
 7.77  | 
 10.0  | 
 14.0  | 
 16.0  | 
| 
 7.87  | 
 10.0  | 
 13.0  | 
 17.0  | 
| 
 7.96  | 
 10.0  | 
 12.0  | 
 18.0  | 
| 
 8.05  | 
 10.0  | 
 11.0  | 
 19.0  | 
| 
 8.14  | 
 10.0  | 
 10.0  | 
 20.0  | 
| 
 8.23  | 
 10.0  | 
 9.0  | 
 21.0  | 
| 
 8.32  | 
 10.0  | 
 8.0  | 
 22.0  | 
| 
 8.41  | 
 10.0  | 
 7.0  | 
 23.0  | 
| 
 8.51  | 
 10.0  | 
 6.0  | 
 24.0  | 
| 
 8.62  | 
 10.0  | 
 5.0  | 
 25.0  | 
| 
 8.74  | 
 10.0  | 
 4.0  | 
 26.0  | 
| 
 8.92  | 
 10.0  | 
 3.0  | 
 27.0  | 
| 
 9.10  | 
 10.0  | 
 2.0  | 
 28.0  | 

