Hydrogen gas (H₂) has a relatively high pK_a value. Is it a stable or unstable acid? Do you expect it to participate in acid–base reactions?

검증된 단계별 안내

Understand the concept of pKₐ: The pKₐ value is a measure of the strength of an acid. A high pKₐ value indicates a weak acid, meaning it does not easily donate protons (H⁺) in solution.

Analyze the pKₐ value of H₂: Hydrogen gas (H₂) has a very high pKₐ value, which suggests that it is an extremely weak acid and does not readily act as a proton donor.

Determine stability: Since H₂ does not easily lose protons, it is considered a stable molecule in terms of acid-base behavior.

Evaluate participation in acid-base reactions: Due to its high pKₐ and weak acidic nature, H₂ is unlikely to participate in acid-base reactions under normal conditions. It is more likely to act as a reducing agent in redox reactions rather than as an acid.

Conclude: Hydrogen gas (H₂) is a stable acid with a high pKₐ value and does not typically participate in acid-base reactions, as it does not readily donate protons.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

pKa Value

The pKa value is a measure of the strength of an acid in solution, indicating how easily it donates protons (H⁺ ions). A high pKa value suggests that the acid is weak and does not dissociate significantly in water, meaning it is less likely to release protons. In the case of hydrogen gas (H₂), its high pKa indicates that it is not a strong acid.

Acid Stability

Acid stability refers to the tendency of an acid to remain in its protonated form versus dissociating to release protons. A stable acid will have a lower tendency to lose its protons, while an unstable acid will readily dissociate. Given that H₂ has a high pKa, it is considered a stable acid, as it does not easily participate in acid-base reactions.

Acid-Base Reactions

Acid-base reactions involve the transfer of protons between species, where acids donate protons and bases accept them. The participation of a substance in these reactions depends on its ability to act as an acid or a base. Since hydrogen gas (H₂) is a weak acid with a high pKa, it is unlikely to participate significantly in acid-base reactions under normal conditions.

Hydrogen gas (H2) has a relatively high pKa value. Is it a stable or unstable acid? Do you expect it to participate in acid–base reactions?