reactions to know for the 5/8 (free answer) section of the AP exam, called the Things To Know or T.T.K.
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| 15902031 | Metal Carbonates --> | Metal Oxides + CO₂ | 0 | |
| 15902032 | Na₂CO₃ --> | Na₂O + CO₂ | 1 | |
| 15902033 | Metal Oxides + Nonmetal Oxides --> | Salt | 2 | |
| 15902034 | MgO + SO₃ --> | MgSO₄ | 3 | |
| 15903268 | Metal Oxides + H₂O --> | Base | 4 | |
| 15903269 | Na₂O + H₂O --> | Na* + OH⁻ | 5 | |
| 15903270 | MgO + H₂O --> | Mg(OH)₂ | 6 | |
| 15903271 | Nonmetal Oxides + H₂O --> | Acid | 7 | |
| 15903272 | P₂O₃ + H₂O --> | H₃PO₃ | 8 | |
| 15903273 | P₂O₅ + H₂O --> | H₃PO₄ | 9 | |
| 15904397 | Cl₂ + OH⁻ --> | OCl⁻ + Cl⁻ + H₂O | 10 | |
| 15904398 | H₂O₂ --> | H₂O + O₂ | 11 | |
| 15904399 | Lewis Base (NH₃ , CN⁻ , SCN⁻ , H₂O , OH⁻) + Transition Metal --> | Complex Ion | 12 | |
| 15904400 | NH₃ + Ag* --> | [Ag(NH₃)₂]* | 13 | |
| 15904401 | Al³* + OH⁻ --> | [Al(OH)₄]⁻ | 14 | |
| 15904402 | Al³* + H₂O --> | [Al(OH₂)₆]³* | 15 | |
| 15907056 | Al + OH⁻ + H₂O --> | [Al(OH)₄]⁻ + H₂ | 16 | |
| 15907057 | in acid: MnO₄⁻ + H* --> | Mn²* + H₂O | 17 | |
| 15907058 | in base: MnO₄⁻ + H₂O --> | OH⁻ + MnO₂ | 18 | |
| 15907059 | LiH + H₂O --> | Li* + OH⁻ + H₂ | 19 | |
| 15907060 | Nonmetal Oxides + OH⁻ --> | bi_____ ion | 20 | |
| 15907061 | CO₂ + OH⁻ --> | HCO₃⁻ | 21 | |
| 15907062 | SO₂ + OH⁻ --> | HSO₃⁻ | 22 | |
| 15907063 | SO₃ + OH⁻ | HSO₄⁻ | 23 | |
| 15907064 | Combustion --> | Stable oxides of both elements | 24 | |
| 15907065 | CH₄ + O₂ --> | CO₂ + H₂O | 25 | |
| 15907066 | CS₂ +O₂ --> | CO₂ + SO₂ | 26 | |
| 15907067 | Light Metal + H₂O --> | Displaces Hydrogen From H₂O | 27 | |
| 15907068 | Na + H₂O --> | Na* + OH⁻ + H₂ | 28 | |
| 15907069 | Meth- | C | 29 | |
| 15907070 | Eth | C₂ | 30 | |
| 15907071 | Prop- | C₃ | 31 | |
| 15907072 | But- | C₄ | 32 |
