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If an upward arrow (↑) is written next to a product in a chemical equation, what does it indicate?

Answer and explanation

Correct answer: A gas is evolving

In the conventional notation used in school chemical equations, an upward arrow (↑) beside a product indicates that a gas is evolved during the reaction. For example, acid reacting with a carbonate may produce carbon dioxide gas, shown with this symbol. A downward arrow (↓), not an upward arrow, is commonly used to indicate an insoluble precipitate. The symbols do not directly represent heat absorption or dissolution.

Related tags

Chemical EquationsGas EvolutionChemical ReactionsNotationPrecipitateChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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