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Synthesis and Decomposition. Synthesis reactions involve the combination of smaller atoms and/or molecules into larger molecules: A + B AB Decomposition reactions involve the splitting of a large molecule into elements or smaller molecules: - PowerPoint PPT Presentation
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Synthesis reactions involve the combination of smaller atoms and/or molecules into larger molecules:
A + B AB
Decomposition reactions involve the splitting of a large molecule into elements or smaller molecules:
AB A + B
Single Displacement reactions involve an element and a compound as reactants. One element displaces or replaces another element form a compound.
magnesium+silver nitrate silver +magnesium nitrateMg + AgNO3 Ag + Mg(NO3)2
Mg + 2AgNO3 2Ag + Mg(NO3)2
Single displacement reactions have the general formula:
Z + AB ZB + A Or
Y + AB AY + B**In the first case, the metal Z has taken the place of element A. In the
second case, the nonmetal Y has taken the place of element B
Double Displacement reactions occurs when elements in different compounds displace each other or exchange places
lead nitrate + potassium iodide lead iodide + potassium nitrate
Pb(NO3) + KI PbI2 + KNO3
Pb(NO3)2 + 2KI PbI2 + 2KNO3
Double displacement reactions have the general formula:
AB + XY AY + XB
**Where A and X are metallic elements and B and Y are nonmetallic elements.