which of the following is not a strong brønsted acid?
Which of the following is not a strong Brønsted acid?
Answer:
To determine which of the following is not a strong Brønsted acid, we first need to understand the concept of a Brønsted acid. A Brønsted acid is a substance that donates a proton (H⁺) to another substance. Strong Brønsted acids completely dissociate in water to donate protons, while weak Brønsted acids only partially dissociate.
Here are some common examples of strong Brønsted acids:
- Hydrochloric acid (HCl)
- Nitric acid (HNO₃)
- Sulfuric acid (H₂SO₄)
However, weak Brønsted acids include:
- Hydrofluoric acid (HF)
- Acetic acid (CH₃COOH)
- Phosphoric acid (H₃PO₄)
Given these examples, if we are provided with a list of acids, we can identify the weak one by comparing them to the known strong acids. Suppose the list includes the following options:
- HCl
- H₂SO₄
- HNO₃
- HF
Among these, hydrochloric acid (HCl), sulfuric acid (H₂SO₄), and nitric acid (HNO₃) are all strong Brønsted acids. Hydrofluoric acid (HF), on the other hand, is a weak Brønsted acid because it does not completely dissociate in water.
Therefore, the correct answer is hydrofluoric acid (HF).
Final Answer:
Hydrofluoric acid (HF) is not a strong Brønsted acid.