Question

1. the following represents two substances by showing only one molecule of each substance. hydrogen chloride sodium hydroxide a chemical reaction occurs when hydrogen chloride and sodium hydroxide are combined. which of the following represents the molecules that are the products of the chemical reaction? a. h - h + o connected to two na b. h - o - na + h - cl c. na - cl + o connected to two h d. two na - cl + h - cl - na

Explanation:

Step1: Identify the reaction type

The reaction between hydrogen chloride (HCl) and sodium hydroxide (NaOH) is a neutralization reaction, which follows the pattern: acid + base → salt + water. The chemical equation is \( \text{HCl} + \text{NaOH}
ightarrow \text{NaCl} + \text{H}_2\text{O} \).

Step2: Analyze the products

From the equation, the products should be sodium chloride (NaCl, an ionic compound represented as \( \text{Na}^+ \) and \( \text{Cl}^- \) or the molecule-like representation of Na - Cl) and water (\( \text{H}_2\text{O} \), which has a structure with two H atoms bonded to an O atom, like the right - hand molecule in option C).

• Option A: The first molecule is \( \text{H}_2 \) and the second is a compound with two Na and one O, which is not \( \text{NaCl} \) or \( \text{H}_2\text{O} \), so A is incorrect.
• Option B: The reactants are just re - arranged, not the products of the reaction, so B is incorrect.
• Option C: The first molecule is \( \text{Na - Cl} \) (representing NaCl) and the second molecule has two H atoms bonded to an O atom (representing \( \text{H}_2\text{O} \)), which matches the products of the neutralization reaction.
• Option D: The second molecule is not the structure of water, so D is incorrect.

Answer:

C. \( \text{Na - Cl} \) \( + \) the molecule with two H and one O (representing \( \text{NaCl} \) and \( \text{H}_2\text{O} \))