Ann is studying acid base neutralization reactions and mixes sodium hydroxide and hydrochloric acid. The reactants were clear,
colorless solution and mixing them produces a clear, colorless final solution and the beaker becomes warm. She knows this reaction
forms liquid water and an aqueous salt based on the neutralization rules as shown by the chemical equation. What physical evidence
indicates that there has been a chemical reaction?
NaOH(aq) + HCl(aq) - NaCl(aq) + H20)
A)
The solution changes color,
Precipitate formation occurs.
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The beaker changes temperature.
Gas bubbles form during the reaction.