| Nm + 02 | Nm0 |
| XCl03 | XCl + 02 |
| X0 + water | X0H |
| Basic anhydrides= | Metal oxides |
| Nm0 + water | HNm0 |
| H(anion) + X0H | X(anion) + water |
| acid anhydrides= | nonmetal oxides |
| AB + CD | AC + CB |
| XHC03 | XC03 + C02 + water |
| XHC03 + H(anion) | X(anion) + C02 + water |
| X + HN03(concentrated) | XN03 + N02 + water |
| XC03 + H(anion) | X(anion) + C02 + water |
| X + HN03(dilute) | XN03 + N0 + water |
| XS03 + H(anion) | X(anion) + S02 + water |
| XHS03 + H(anion) | X(anion) + S02 + water |