2DefinitionA chemical reaction is the process by which one or more substances change into one or more new substances whose chemical and physical properties differ from those of the original substances.
3Writing a Chemical Reaction Reactants are the elements or compounds you begin withProducts are the elements or compounds you end withReactants Products“yield”
4Numbers H+1 P-3 H2O C6H12O6 2NaCl 5H2O Superscripts show the charge of an ionSubscripts show the # of atoms in a compoundCoefficients show the # of moleculesH P-3H2O C6H12O62NaCl 5H2O
5Fill in the BlanksYieldsReactantsProductSubscriptCoefficient
14Sodium + Chlorine gas Salt SynthesisSodium + Chlorine gas Salt2Na + Cl2 2NaCl
15DecompositionA decomposition reaction starts with one reactant and ends up with two or more products.
16DecompositionCalcium carbonate decomposes to produce calcium oxide and carbon dioxide.CaCO3 CaO + CO2
17Single ReplacementA single-replacement reaction starts with two reactants and ends up with two products. An element takes the place of another element that’s in a compound.
18Single Replacement 2Al + 3CuCl2 3Cu + 2AlCl3 Aluminum foil is placed in a solution of copper II chloride which produces copper metal and aluminum chloride solution.2Al + 3CuCl2 3Cu + 2AlCl3
19Double ReplacementA double-replacement reaction starts with two reactants and ends up with two products. In this case both reactants and products are compounds. They simply change partners.
20Double Replacement 2NaCl + Pb(NO3)2 2NaNO3 + PbCl2 A solution of sodium chloride is mixed with a solution of lead nitrate resulting in the production of sodium nitrate and lead chloride.2NaCl + Pb(NO3)2 2NaNO3 + PbCl2
21CombustionA combustion reaction always involves a hydrocarbon and oxygen as reactants and ends up with carbon dioxide and water as products.
22What type of reaction is this? 2H2O 2H2 + O2SynthesisDecompositionSingle ReplacementDouble Replacement
23What type of reaction is this? 4P + 5O2 P4O10SynthesisDecompositionSingle ReplacementDouble Replacement
24What type of reaction is this? 2MgO 2Mg + O2SynthesisDecompositionSingle ReplacementDouble Replacement
25What type of reaction is this? BaCl2 + H2S BaS + 2HClSynthesisDecompositionSingle ReplacementDouble Replacement
26What type of reaction is this? 2Al2O3 4Al + 3O2SynthesisDecompositionSingle ReplacementDouble Replacement
27What type of reaction is this? Cl2 + 2NaBr Br2 + 2NaClSynthesisDecompositionSingle ReplacementDouble Replacement
28What type of reaction is this? 3H2 + N2 2NH3SynthesisDecompositionSingle ReplacementDouble Replacement
29What type of reaction is this? CaCl2 + 2KBr 2KCl + CaBr2SynthesisDecompositionSingle ReplacementDouble Replacement
30What type of reaction is this? H2O + MgO Mg(OH)2SynthesisDecompositionSingle ReplacementDouble Replacement
31What type of reaction is this? 2NH4CO3 2NH3 + H2O + CO2SynthesisDecompositionSingle ReplacementDouble Replacement
32What type of reaction is this? Cu + AgNO3 Ag + CuNO3SynthesisDecompositionSingle ReplacementDouble Replacement
33What type of reaction is this? 2Al + 3CuCl2 3Cu + 2AlCl3SynthesisDecompositionSingle ReplacementDouble Replacement
34What type of reaction is this? C + 2H2 CH4SynthesisDecompositionSingle ReplacementDouble Replacement
35What type of reaction is this? 3NiO + 2Li3P 3Li2O + Ni3P2SynthesisDecompositionSingle ReplacementDouble Replacement
36What type of reaction is this? CuCl2 + H2S 2HCl + CuSSynthesisDecompositionSingle ReplacementDouble Replacement
37What type of reaction is this? 2H3PO4 3H2O + P2O5SynthesisDecompositionSingle ReplacementDouble Replacement
38What type of reaction is this? 2Na + FeO Fe + Na2OSynthesisDecompositionSingle ReplacementDouble Replacement