At physiological pH the ammonia is protonated to form_________.

Answer

To answer the question "At physiological pH the ammonia is protonated to form_________", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Physiological pH**:
- Physiological pH typically refers to a pH around 7.4, which is the normal pH of human blood and many biological fluids.

2. **Identifying Ammonia**:
- Ammonia (NH₃) is a basic compound that can accept protons (H⁺ ions).

3. **Protonation Process**:
- At physiological pH, ammonia can react with protons (H⁺) present in the solution. This process is known as protonation.

4. **Formation of Ammonium Ion**:
- When ammonia (NH₃) is protonated, it gains a proton (H⁺) and is converted into ammonium ion (NH₄⁺).

5. **Conclusion**:
- Therefore, at physiological pH, ammonia is protonated to form **ammonium ion (NH₄⁺)**.

### Final Answer:
At physiological pH, the ammonia is protonated to form **ammonium ions (NH₄⁺)**.

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