Choose the products that complete the reaction. The chemical equations may not be balanced.
[tex]HCl + NaOH \rightarrow[/tex] ?
A. [tex]NaCl + H _2 O[/tex]
B. [tex]NaCl + CO _2+ H _2 O[/tex]
C. [tex]NaCl + H _2[/tex]
Answer (2)
The reaction between H Cl and N a O H is an acid-base neutralization.
The products of this reaction are a salt and water.
The salt formed is sodium chloride ( N a Cl ), and the water is H 2 O .
Therefore, the correct products are N a Cl + H 2 O .
Explanation
Understanding the Reaction The reaction between hydrochloric acid ( H Cl ) and sodium hydroxide ( N a O H ) is a classic acid-base neutralization reaction. In this type of reaction, the acid and base react to form a salt and water.
Identifying the Products Hydrochloric acid ( H Cl ) is an acid, and sodium hydroxide ( N a O H ) is a base. When they react, the hydrogen ion ( H + ) from the acid combines with the hydroxide ion ( O H − ) from the base to form water ( H 2 O ). The remaining ions, sodium ( N a + ) and chloride ( C l − ), combine to form sodium chloride ( N a Cl ), which is a salt.
The Products Therefore, the correct products of the reaction are sodium chloride ( N a Cl ) and water ( H 2 O ). The balanced chemical equation for this reaction is: H Cl + N a O H → N a Cl + H 2 O
Eliminating Incorrect Options The other options provided are incorrect. N a Cl + C O 2 + H 2 O would require an additional source of carbon, which is not present in the reactants. N a Cl + H 2 would involve the reduction of hydrogen ions to hydrogen gas, which does not occur in this reaction.
Final Answer The products that complete the reaction are N a Cl and H 2 O .
Examples
Acid-base neutralization reactions are essential in many real-world applications. For example, antacids use bases like magnesium hydroxide to neutralize excess stomach acid ( H Cl ), relieving heartburn. In chemistry labs, these reactions are used to titrate acids and bases, determining their concentrations. Understanding these reactions is also crucial in environmental science, where neutralizing acidic pollutants can prevent ecological damage. The principles of acid-base chemistry are fundamental to various fields, highlighting the practical importance of understanding chemical reactions and their products.
The reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) produces sodium chloride (NaCl) and water (H2O), making option A the correct answer. This reaction is an example of acid-base neutralization. The balanced equation for the reaction is HCl + NaOH → NaCl + H2O.
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