The conjugate acid of azide ion is

Options

A. `NH_(3)`
B. `N_(3)H`
C. `N_(3)H`
D. `Na_(2)^(-)`

Explanation

To find the conjugate acid of the azide ion (N₃⁻), we need to follow these steps:

### Step 1: Understand the Concept of Conjugate Acids and Bases
A conjugate acid is formed when a base accepts a proton (H⁺). In this case, the azide ion (N₃⁻) acts as a base.

**Hint:** Remember that a base gains a proton to become its conjugate acid.

### Step 2: Identify the Azide Ion
The azide ion is represented as N₃⁻. This ion has a negative charge, indicating that it has an extra electron compared to the neutral azide molecule.

**Hint:** The charge of the ion is crucial in determining how it will interact with protons.

### Step 3: Add a Proton to the Azide Ion
To find the conjugate acid, we need to add a proton (H⁺) to the azide ion (N₃⁻):
\[ \text{N₃⁻} + \text{H⁺} \rightarrow \text{N₃H} \]

**Hint:** When you add a proton to a negatively charged ion, the resulting species will be neutral or less negatively charged.

### Step 4: Write the Resulting Conjugate Acid
After adding the proton, we get N₃H, which is the conjugate acid of the azide ion.

**Hint:** The resulting compound after protonation is your answer.

### Conclusion
The conjugate acid of the azide ion (N₃⁻) is N₃H.

**Final Answer:** N₃H