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Practice & Assess

The Limestone Cycle

Explore the transformations between limestone, quicklime, slaked lime, and limewater

Current State

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Click a stage in the cycle to view details

💡 Checkpoint

HKDSE Tip

Four stages: $The limestone cycle links four substances: CaCO₃ \to CaO \to Ca(OH)₂(s) \to Ca(OH)₂(aq). Click each stage to see stage-specific tips.$
Reversible loop: $Bubbling CO₂ into limewater re-forms CaCO₃, closing the cycle back to limestone.$