Some molecules are able to stabilize a negative charge by passing it from one atom to the next by a flip-flopping of double bonds. This occurs when the negative charge is one atom away from an oxygen double bond as shown below. Note that the curved arrows indicate the movement of electrons.

Why, then, is sulfuric acid so much stronger an acid than carbonic acid?

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от от Но Но Но НО S— ОН НО ОН || Carbonic acid Sulfuric acid