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Definition: a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.
Analogy: Like the show "Wife Swap".
Example: Na₂S+₂HCl-->2NaCl+HS

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Definition:  a reaction by which one (or more) element(s) replaces an/other element(s) in a compound.
Analogy: When your buy new shoes, and replace your old ones.
Example: Zn+CuCl₂-->ZnCl₂+Cu

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Definition: Anytime anything burns (in the usual sense), it is a combustion reaction.
Analogy: Setting wood on fire
Example: C₆H₁₄+O₂-->CO₂+H₂O

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Definition:  breaking down a compound into smaller compounds or individual elements.
Analogy: Your body breaking down food.
Example: H2O --> H+H+O

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Definition: 2 or more substances combine to produce a new substance.
Analogy: Like a left and right shoe go together.
Example: Combining sodium and chlorine to get NaCl, or Salt.