pH | Surface tension method | Conductance method |
3 | 0.0040 | 0.0044 |
4 | 0.0032 | 0.0038 |
5 | 0.0025 | 0.0023 |
6 | 0.0023 | 0.0021 |
7 | 0.0022 | 0.0020 |
8 | 0.0022 | 0.0020 |
9 | 0.0022 | 0.0020 |
10 | 0.0022 | 0.0020 |