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The chemical equation above describes the reaction between nitric acid (HNO3) and calcium hydroxide (Ca(OH)2) to produce nitrogen dioxide (NO2), water (H2O), and calcium nitrate (Ca(NO3)2).
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Reaction conditions: This reaction occurs under standard temperature and pressure conditions and does not require a catalyst.
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Reaction process:
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Phenomenon observed: As the reaction takes place, one can observe a color change in the solution due to the appearance of nitrogen dioxide (NO2) – a reddish-orange gas. Also, the solution will transition from the strong base state of calcium hydroxide (Ca(OH)2) to a neutral state due to the formation of calcium nitrate (Ca(NO3)2) and water (H2O).