Explain double decomposition reaction.
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Answer:
A double decomposition reaction is a reaction in which the positive ions and negative ions in two compounds switch partners to form two new compounds.
The equation is often written in the general form
AB + CD→CB + AD
The older term double decomposition has been largely replaced by the terms double displacement, double replacement, and metathesis.
Many double decomposition reactions are precipitation reactions.
AgNO3(aq)+NaCl(aq)→AgCl(s)+NaNO3(aq)
Others are acid-base neutralization reactions.
HCl(aq)+NaOH(aq)→NaCl(aq)+HOH(l)
Here is a good video on double replacement reactions.
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double decomposition reaction - a chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (AB+CD=AD+CB) double decomposition, metathesis.