| 水に対する溶解性 | |||||||||
| NH4+ | Na+ K+ | Mg2+ | Ca2+ Ba2+ | Zn2+ Al3+ | Fe2+ Fe3+ | Pb2+ | Cu2+ | Ag+ | |
| O2- | --- | ○ | × | △ | × | × | × | × | × |
| OH- | ○ | ○ | × | △ | × | △ × | × | × | --- |
| Cl- | ○ | ○ | ○ | ○ | ○ | ○ | △ | ○ | × |
| SO42- | ○ | ○ | ○ | × | ○ | ○ | × | ○ | △ |
| NO3- | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ |
| CO32- | ○ | ○ | × | × | × --- | × --- | × | × | × |
| PO43- | ○ | ○ | × | × | × | × | × | × | × |
| CH3COO- | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | △ |