Q. 7.37 - An Introduction to General, Organic, and Biological Chemistry

Question

Balance each of the following chemical equations:

$$\begin{gathered} \text{ a. }{\mathrm{N}}_2\left(g\right)+{\mathrm{O}}_2\left(g\right)⟶\mathrm{NO}\left(g\right) \\ \text{ b. }\mathrm{HgO}\left(s\right)⟶\mathrm{Hg}\left(l\right)+{\mathrm{O}}_2\left(g\right) \\ \text{ c. }\mathrm{Fe}\left(s\right)+{\mathrm{O}}_2\left(g\right)⟶{\mathrm{Fe}}_2{\mathrm{O}}_3\left(s\right) \\ \text{ d. }\mathrm{Na}\left(s\right)+{\mathrm{Cl}}_2\left(g\right)⟶\mathrm{NaCl}\left(s\right) \end{gathered}$$

Step-by-Step Solution

Answer

The balanced equations for the above parts are:

$$\begin{gathered} \text{ a. }{\mathrm{N}}_2\left(g\right)+{\mathrm{O}}_2\left(g\right)⟶2\mathrm{NO}\left(g\right) \\ \text{ b. 2}\mathrm{HgO}\left(s\right)⟶2\mathrm{Hg}\left(l\right)+{\mathrm{O}}_2\left(g\right) \\ \text{ c. 4}\mathrm{Fe}\left(s\right)+3{\mathrm{O}}_2\left(g\right)⟶2{\mathrm{Fe}}_2{\mathrm{O}}_3\left(s\right) \\ \text{ d. 2}\mathrm{Na}\left(s\right)+{\mathrm{Cl}}_2\left(g\right)⟶2\mathrm{NaCl}\left(s\right) \end{gathered}$$

Part (a) Step 1: Given information

We have been given an equation.${\mathrm{N}}_2\left(g\right)+{\mathrm{O}}_2\left(g\right)⟶\mathrm{NO}\left(g\right)$

Part (a) Step 2: Simplify

To balance the equation, follow the steps below.

• Count the number of distinct types of atoms in the reactants and products.
• To increase the amount of atoms or molecules in the substances, place coefficients in front of symbols or formulas as needed.
• Reverse the first and second steps until the equation is balanced.

We can achieve this by repeating these procedures.

${\mathrm{N}}_2\left(g\right)+{\mathrm{O}}_2\left(g\right)⟶2\mathrm{NO}\left(g\right)$

Part (b) Step 1: Given information:

We have been given an equation.$\mathrm{HgO}\left(s\right)⟶\mathrm{Hg}\left(l\right)+{\mathrm{O}}_2\left(g\right)$

Part (b) Step 2: Simplify

To balance the equation, follow the steps below.

• Count the number of distinct types of atoms in the reactants and products.
• To increase the amount of atoms or molecules in the substances, place coefficients in front of symbols or formulas as needed.
• Reverse the first and second steps until the equation is balanced.

We can achieve this by repeating these procedures.

$2\mathrm{HgO}\left(s\right)⟶2\mathrm{Hg}\left(l\right)+{\mathrm{O}}_2\left(g\right)$

Part (c) Step 1: Given information:

We have been given an equation.$\mathrm{Fe}\left(s\right)+{\mathrm{O}}_2\left(g\right)⟶{\mathrm{Fe}}_2{\mathrm{O}}_3\left(s\right)$

Part (c) Step 2: Simplify

To balance the equation, follow the steps below.

• Count the number of distinct types of atoms in the reactants and products.
• To increase the amount of atoms or molecules in the substances, place coefficients in front of symbols or formulas as needed.
• Reverse the first and second steps until the equation is balanced.

We can achieve this by repeating these procedures.

$4\mathrm{Fe}\left(s\right)+3{\mathrm{O}}_2\left(g\right)⟶2{\mathrm{Fe}}_2{\mathrm{O}}_3\left(s\right)$

Part (d) Step 1: Given information

We have been given an equation $\mathrm{Na}\left(s\right)+{\mathrm{Cl}}_2\left(g\right)⟶\mathrm{NaCl}\left(s\right)$

Part (d) Step 2: Simplify

To balance the equation, follow the steps below.

• Count the number of distinct types of atoms in the reactants and products.
• To increase the amount of atoms or molecules in the substances, place coefficients in front of symbols or formulas as needed.
• Reverse the first and second steps until the equation is balanced.

We can achieve this by repeating these procedures.

$2\mathrm{Na}\left(s\right)+{\mathrm{Cl}}_2\left(g\right)⟶2\mathrm{NaCl}\left(s\right)$