Question

What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution? A) Precipitation B) Acid-base neutralization C) Oxidation-reduction D) Gas evolution E) No reaction"

Answer 1

When hydrochloric acid is mixed with sodium bicarbonate, an acid-base neutralization reaction occurs resulting in the evolution of carbon dioxide gas, formation of water, and sodium chloride salt. The correct answer is D) Gas evolution.

Step-by-step explanation:

When a solution of hydrochloric acid (HCl) is mixed with a solution of sodium bicarbonate (NaHCO₃), an acid-base neutralization reaction occurs. Despite the information provided discussing the reaction of hydrochloric acid with sodium hydroxide (NaOH), a similarly behaving compound, sodium bicarbonate is the compound of interest in this question. The reaction of HCl with NaHCO₃ involves the production of carbon dioxide (CO₂) gas, water (H₂O), and sodium chloride (NaCl) salt.

The chemical equation for the reaction is as follows:

• HCl(aq) + NaHCO₃(aq) → CO₂(g) + H₂O(l) + NaCl(aq)

This is an example of a gas evolution reaction, where carbon dioxide is the gas evolved. While neutralization reactions typically produce water and a salt, the presence of the bicarbonate ion allows for the additional production of CO₂ gas in this case. Hence, the correct answer to the student's question is D) Gas evolution.

Answer 2

The reaction between hydrochloric acid and sodium bicarbonate is a gas evolution and acid-base neutralization reaction that produces sodium chloride, water, and carbon dioxide gas.

Step-by-step explanation:

When a solution of hydrochloric acid (HCl) is mixed with a solution of sodium bicarbonate (NaHCO3), an acid-base neutralization reaction occurs. The reaction also falls under the category of a gas evolution reaction because carbon dioxide (CO2) gas is produced as a byproduct.

The balanced chemical equation for this reaction is: HCl(aq) + NaHCO3(aq) → CO2(g) + NaCl(aq) + H2O(l). In this reaction, hydrochloric acid and sodium bicarbonate react to form sodium chloride (a salt), water, and carbon dioxide gas. These types of reactions demonstrate the characteristic of producing a gas as the visible sign of the reaction.

Furthermore, neutralization reactions generally involve an acid and a base reacting to form water and a salt. This reaction is an excellent example of such a process, although the additional formation of carbon dioxide gas distinguishes it from other simple neutralization reactions where only water and salt are produced.