Chapter 9.2, Problem 15PP

Interpretation Introduction

Interpretation:

The chemical equation for the given reaction of water and dinitrogen pentoxide gas to produce aqueous hydrogen nitrate needs to be written.

Concept introduction:

In a chemical reaction, the reactants are written on the left side of the equation and the product is written on the right side. The product and the reactants contain an arrow between them showing the proceeding of the reaction from the reactants to the products.

A chemical equation is balanced by balancing the number of moles of each element on the reactants and on the products.

Answer to Problem 15PP

A chemical equation for the reaction is as follows:

${\text{H}}_{\text{2}}\text{O}\left(\text{l}\right)\text{+}{\text{N}}_{\text{2}}{\text{O}}_{\text{5}}\left(\text{g}\right)\to {\text{2HNO}}_{\text{3}}\left(\text{aq}\right)$

This is a type of synthesis reaction.

Explanation of Solution

A chemical equation for the given reaction is as follows:

${\text{H}}_{\text{2}}\text{O}\left(\text{l}\right)\text{+}{\text{N}}_{\text{2}}{\text{O}}_{\text{5}}\left(\text{g}\right)\to {\text{HNO}}_{\text{3}}\left(\text{aq}\right)$

The above reaction is not balanced, it can be balanced by giving coefficient 2 to HNO₃ thus, ${\text{H}}_{\text{2}}\text{O}\left(\text{l}\right)\text{+}{\text{N}}_{\text{2}}{\text{O}}_{\text{5}}\left(\text{g}\right)\to 2{\text{HNO}}_{\text{3}}\left(\text{aq}\right)$

In Synthesis reaction, two reactants combined to give one product.

$\text{A}\text{+}\text{B}\to \text{AB}$

Therefore, this reaction is a synthesis reaction.

Conclusion

Thus, the balanced synthesis reaction is as follows:

${\text{H}}_{\text{2}}\text{O}\left(\text{l}\right)\text{+}{\text{N}}_{\text{2}}{\text{O}}_{\text{5}}\left(\text{g}\right)\to 2{\text{HNO}}_{\text{3}}\left(\text{aq}\right)$