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Which of the following is not a proton disassociation of a monoprotic acid?

1) HCl
2) H₂SO₄
3) HNO₃
4) H₂O

User Kobame
by
8.2k points

1 Answer

4 votes

Final answer:

Option 2 (H2SO4) is not a proton dissociation of a monoprotic acid; it is a diprotic acid that can dissociate in two steps, thereby releasing two protons. Option 2 is correct.

Step-by-step explanation:

The question asks which option is not a proton dissociation of a monoprotic acid. Monoprotic acids are acids that can donate only one proton (hydrogen ion) to a base during a chemical reaction. Examples of monoprotic acids include hydrochloric acid (HCl) and nitric acid (HNO3).

On the other hand, sulfuric acid (H2SO4) is an example of a diprotic acid, meaning it can lose two protons. Lastly, water (H2O) is not considered to be a classic acid in the Arrhenius sense, so it is not classified as monoprotic in this context.

The correct answer to the question is option 2) H2SO4, as it is a diprotic acid, not a monoprotic acid. It can dissociate in two steps, first to form HSO4- and then to form SO42-. Each step involves the loss of a proton, providing two proton dissociations in total, unlike monoprotic acids that only have one such dissociation.

User Arjan Kroon
by
8.4k points
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