If one of the reactants in a reaction is Na20, what is known about the products?
A. The products will have no more than 2 Na atoms and 1 0 atom.
B. There is not enough information to say anything about the products.
C. The products will contain exactly 2 Na atoms and 1 O atom.
D. The products will have at least 2 Na atoms and 1 0 atom.
The Correct Answer and Explanation is:
The correct answer is D. The products will have at least 2 Na atoms and 1 O atom.
Explanation:
The reactant in the given question is sodium oxide, ( \text{Na}_2\text{O} ), which is a compound composed of sodium (Na) and oxygen (O). When sodium oxide (( \text{Na}_2\text{O} )) reacts in a chemical reaction, it typically interacts with other substances, often forming new products by bonding with other elements.
The key point here is that sodium oxide is a binary compound consisting of 2 sodium (Na) atoms and 1 oxygen (O) atom. The reaction type and products depend on what sodium oxide reacts with. For instance, if sodium oxide reacts with water (( \text{H}_2\text{O} )), it forms sodium hydroxide (( \text{NaOH} )):
[
\text{Na}_2\text{O} + \text{H}_2\text{O} \rightarrow 2 \text{NaOH}
]
In this case, the products are sodium hydroxide molecules, each of which contains one sodium atom and one hydroxide group (( \text{OH} )). This type of reaction, where sodium oxide reacts with water, leads to the formation of products that still contain the 2 sodium atoms and 1 oxygen atom from the original reactant, albeit rearranged into different molecular structures.
In other cases, sodium oxide can react with acids, forming salts. For example, reacting sodium oxide with sulfuric acid (( \text{H}_2\text{SO}_4 )) would produce sodium sulfate (( \text{Na}_2\text{SO}_4 )):
[
\text{Na}_2\text{O} + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + \text{H}_2\text{O}
]
In this example, the 2 sodium atoms and 1 oxygen atom from sodium oxide combine with other elements, and the products still contain at least 2 sodium atoms and 1 oxygen atom, as required by the conservation of mass.
Thus, while the specific molecular structure of the products depends on the other reactants, it is guaranteed that at least 2 sodium atoms and 1 oxygen atom will be present in the products because of the composition of the sodium oxide reactant. Therefore, answer choice D is the most accurate.