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This informative text explains different types of chemical reactions, such as synthesis, decomposition, single replacement, double replacement, and combustion. Examples of each reaction type are also provided.
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A + B → AB AB → A + B AB + C → AC + B AB + CD → AD + CB X + O2→ Products A = Red B = Blue C = Green D = Yellow
Synthesis Reaction: A + B → AB When two elements react, the reaction is always a synthesis reaction. Example: 2 Na (s) + Cl2 → 2 NaCl
Decomposition Reaction: AB → A + B Single compound breaks down into two or more substances. Example: 2NaN3(s) → 2 Na (s) + 3 N2
Single Replacement Reactions: A + BC → B + AC → AC + B Atoms of one element replace the atoms of another element in a compound. Example: Cu (s) + 2 AgNO3 (aq) → 2 Ag (s) + Cu(NO3)2 (aq)
Double Replacement Reaction: A+B- + C+D- → A+D- + C+B- Exchange of ions between two compounds Example: KCN(aq) + HBr (aq) → KBr(aq) + HCN (g)
Combustion Reaction: Example: C (s) + O2 → CO2 In a combustion a substance is always combined with a oxygen. Note: Oxygen is on the reactants side. Example 2: 2 H2 (g) + O2 (g) → 2 H2O (l)