| Voltage (V) | Volume of HHO gas produced at 0.05 M electrolyte strength of KOH | ||
| KOH (cm3) | NaOH (cm3) | NaHCO3 (cm3) | |
| 9 | 26.8 | 21.9 | 11.9 |
| 10 | 34.8 | 31.6 | 17.7 |
| 11 | 59.3 | 56.7 | 19.9 |
| 12 | 91.7 | 84.4 | 25.0 |
| 13 | 113.5 | 99.3 | 29.0 |