REVERSIBLE REACTIONS: Reaction that can occur in both directions (reactants can react to form products, and products can react to form initial reactants)
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CHEMICAL EQUATIONS FOR REVERSIBLE REACTIONS:
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When writing chemical equations for reversible reactions, two arrows are used with each having half an arrow head (to indicate reaction can occur in both directions):
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Dehydration of Hydrated Copper (II) Sulfate:
Hydrous Copper (II) Sulfate ⇌ Anhydrous Copper (II) Sulfate + Water
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Thermal Decomposition of Ammonium Chloride:
Ammonium Chloride ⇌ Ammonia + Hydrogen Chloride
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