The reaction between
HCl(aq) and NaHCO3(aq) produces all of the following compounds except __.
Select one:
· H2O(l)
· NaCl(aq)
· CO2(g)
· O2(g)
The Correct Answer and Explanation is :
The correct answer is O₂(g).
Explanation:
The reaction between hydrochloric acid (HCl) and sodium bicarbonate (NaHCO₃) is a well-known acid-base reaction that produces carbon dioxide (CO₂), water (H₂O), and sodium chloride (NaCl). The balanced equation for the reaction is as follows:
[
\text{NaHCO}_3(aq) + \text{HCl}(aq) \rightarrow \text{NaCl}(aq) + \text{CO}_2(g) + \text{H}_2\text{O}(l)
]
Let’s break down the products formed:
- H₂O (liquid): Water is formed because the acid (HCl) reacts with the bicarbonate ion (HCO₃⁻) to produce water.
- NaCl (aqueous): Sodium chloride is formed because the sodium ion (Na⁺) from sodium bicarbonate combines with the chloride ion (Cl⁻) from hydrochloric acid.
- CO₂ (gas): Carbon dioxide is produced as a result of the decomposition of bicarbonate (HCO₃⁻) when it reacts with the acid. This results in the formation of carbonic acid (H₂CO₃), which is unstable and immediately decomposes into CO₂ and water.
- O₂ (gas): Oxygen (O₂) is not produced in this reaction. Oxygen is typically produced in reactions involving the decomposition of peroxides or other oxygen-rich compounds, but not in the reaction between HCl and NaHCO₃. The products of this reaction are limited to NaCl, CO₂, and H₂O.
Thus, O₂(g) is the compound that is not produced in this reaction, making it the correct answer.