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Mansoura National University
Pharm D-Clinical Pharmacy Program Level 1 Pharm. Anal. Chem. 1 (PC 101)
2) Metathesis (double replacement) reactions
❖ A Kind of reaction in which cations and anions have exchanged their partners (also
called double replacement reaction).
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▪ (Cl has replaced NO 3 and NO 3 has replaced Cl )
Why do Metathesis Reactions (double replacement) Occur?
Three general driving forces in metathesis reactions:
A. Formation of a precipitate
B. Formation of a weak electrolyte
C. Formation of a gas (volatilization reactions)
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