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Energy Changes in Dissolving Reactions Calcium Chloride and Ammonium Nitrate in Water

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Created on October 4, 2025

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Transcript

Energy Changes in Dissolving Reactions Calcium Chloride and Ammonium Nitrate in Water

In this investigation, you’ll watch what happens as each substance dissolves in water. Pay close attention to any temperature changes, they’ll help you decide whether each reaction releases or absorbs energy.

Calcium Chloride and Water

Ammonium Nitrate and Water

Both

Calcium Chloride and Water

When calcium chloride dissolves in water, it breaks apart into calcium ions and chloride ions.

CaCl₂ (solid) → Ca²⁺ (aqueous) + 2 Cl⁻ (aqueous)

This process involves a transfer of energy between the substances and the surroundings.

Ammonium Nitrate and Water

When ammonium nitrate dissolves in water, it separates into ammonium ions and nitrate ions.

NH₄NO₃ (solid) → NH₄⁺ (aqueous) + NO₃⁻ (aqueous)

This process involves a transfer of energy between the substances and the surroundings.

Ammonium Nitrateand Water

Calcium Chloride and Water