Product Chemistry Example 4

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Example 4

medium
When baking soda (NaHCO3\text{NaHCO}_3) reacts with vinegar (acetic acid, CH3COOH\text{CH}_3\text{COOH}), bubbles form. Identify the gas product and explain what evidence indicates a new product has formed.

Solution

  1. 1
    The reaction is: NaHCO3+CH3COOH→CH3COONa+H2O+CO2\text{NaHCO}_3 + \text{CH}_3\text{COOH} \rightarrow \text{CH}_3\text{COONa} + \text{H}_2\text{O} + \text{CO}_2. The gas product is CO2\text{CO}_2 (carbon dioxide).
  2. 2
    Evidence of a new product: gas bubbles (effervescence) indicate formation of a gaseous product that was not present before the reaction.

Answer

CO2 gas — evidenced by bubbling/effervescence\text{CO}_2\text{ gas — evidenced by bubbling/effervescence}
The formation of gas bubbles is one of the classic signs that a chemical reaction has produced new substances. Other signs include color change, temperature change, and precipitate formation.

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A product is a substance that is formed as the result of a chemical reaction.

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