Conjugate base of `NH_(3)` is

Options

A. `NH_(4)^(o+)`
B. `NH_(2)^(o+)`
C. `NH_(2)^(o+)`
D. `N_(2)`

Explanation

To find the conjugate base of \( NH_3 \) (ammonia), we can follow these steps:

### Step 1: Understand the Concept of Conjugate Bases
A conjugate base is formed when an acid donates a proton (H⁺). In the case of ammonia (\( NH_3 \)), we need to determine what happens when it donates a proton.

**Hint:** Remember that the conjugate base is what remains after an acid has lost a proton.

### Step 2: Identify the Acid
Here, \( NH_3 \) acts as a weak base and can accept a proton to become \( NH_4^+ \) (ammonium ion). However, we are interested in its behavior as an acid.

**Hint:** Think about what happens when \( NH_3 \) donates a proton.

### Step 3: Determine the Conjugate Base
When \( NH_3 \) donates a proton (H⁺), it loses one hydrogen atom, resulting in the formation of \( NH_2^- \) (amide ion). Thus, the conjugate base of \( NH_3 \) is \( NH_2^- \).

**Hint:** The formula for the conjugate base will have one less hydrogen than the original acid.

### Step 4: Conclusion
Therefore, the conjugate base of \( NH_3 \) is \( NH_2^- \).

**Final Answer:** The conjugate base of \( NH_3 \) is \( NH_2^- \).

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