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. na—cl + h—cl—na

Explanation:

Step1: Identify the reaction type

Hydrogen chloride (HCl) and sodium hydroxide (NaOH) undergo a neutralization reaction, which is a type of double - displacement reaction. The general formula for a neutralization reaction between an acid (HCl) and a base (NaOH) is \( \text{Acid}+\text{Base}
ightarrow\text{Salt}+\text{Water} \).

Step2: Determine the products

For the reaction \( \text{HCl}+\text{NaOH}
ightarrow\text{NaCl}+\text{H}_2\text{O} \). Now let's analyze each option:

• Option A: The first molecule is \( \text{H}_2 \) and the second is a molecule with two Na and one O, which is not \( \text{NaCl} \) or \( \text{H}_2\text{O} \), so A is incorrect.
• Option B: The molecules are the reactants (NaOH and HCl) again, so it represents no reaction, B is incorrect.
• Option C: The first molecule is \( \text{NaCl} \) (sodium chloride, the salt) and the second molecule is \( \text{H}_2\text{O} \) (water), which matches the products of the neutralization reaction.
• Option D: The second molecule is not \( \text{H}_2\text{O} \), so D is incorrect.

Answer:

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