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Chemistry 21 Online
OpenStudy (anonymous):

what visible evidence is there to determine whether a reaction is single or double displacement?

OpenStudy (jfraser):

lots of single displacement reactions are metal-displacements. one metal will "kick out" another metal from a solution, causing that metal to coat the surface. Lots of single displacement reactions produce gas, like H2. if a reaction bubbles, lots of times that indicates (but doesn't guarantee) that the reaction is a single-displacement.

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