Definition: A double replacement reaction is a chemical reaction where two reactant ionic compounds exchange ions to form two new product compounds with the same ions.
Double replacement reactions take the form:A+B- + C+D- → A+D- + C+B-
Examples:
The reaction
AgNO3 + NaCl → AgCl + NaNO3
is a double replacement reaction.
The silver traded its nitrite ion for the sodium's chloride ion.
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