Table 3.
Ionic composition of seawater. Concentrations are shown as millimolar (mM).
| Sea Water | pH = 8.1 |
|---|---|
| Na | 469 mM |
| Ca | 10 mM |
| Mg | 53 mM |
| K | 10 mM |
| HCO3 | 2 mM |
| SO4 | 28 mM |
| SiO2 | 0 |
| Cationic equivalents | 605 mM |
| Anionic equivalents | 604 mM |
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