Is H2SO3 a weak acid

Answer 1

It is a strong acid only for the first hydrogen ion that is produced.

(1) H2SO4 --> H+ + HSO4^-

The remaining bisulfate ion, HSO4^-, is a weak acid and only partially dissociates.

(2) HSO4^- <==> H+ + SO4^2-

A misconception is that since sulfuric acid is a strong acid, that it dissociates like this:

(3) H2SO4 --> 2H+ + SO4^2-

That simply isn't the case except for extremely dilute solutions. As the concentration of the acid decreases, the acid behaves more and more like a strong diporotic acid. At "infinite dilution" it is accurate to write the dissociation as equation (3).

Answer 2

Strong.... So strong, in fact, it will react with table salt to form hydrochloric acid

(also fairly strong) and sodium sulfate.

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It is a strong acid only for the first hydrogen ion that is produced.

(1) H2SO4 --> H+ + HSO4^-

The remaining bisulfate ion, HSO4^-, is a weak acid and only partially dissociates.

(2) HSO4^- <==> H+ + SO4^2-

A misconception is that since sulfuric acid is a strong acid, that it dissociates like this:

(3) H2SO4 --> 2H+ + SO4^2-

That simply isn't the case except for extremely dilute solutions. As the concentration of the acid decreases, the acid behaves more and more like a strong diporotic acid. At "infinite dilution" it is accurate to write the dissociation as equation (3).

Read more: Is_H2SO4_a_strong_acid_or_weak_acid

Answer 3

There is no evidence that sulfurous acid exists in solution at all, so your question is rather difficult to answer. If it can not donate protons in solution it is not an acid.

Answer 4

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Answer 5

H2S is a weak acid.

Answer 6

H2SO4 is a strong acid

Answer 7

yes