corrosive
concentrated
reactive
soluble in water
ionized in water
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Tetraoxosulphate (IV) acid is H2SO3. This is actually a weak acid.
Tetraoxosulphate (VI) acid is H2SO4. This is the famous strong acid.
The question definitely meant H2SO4, but regardless of the typo, the definition of a "strong acid" never changes.
In Chemistry, the "strength" of an acid has absolutely nothing to do with how concentrated it is or how much it burns your skin. It is entirely about how generous it is with its Hydrogen ions H+ when you drop it in water.
Think of acids as billionaires, and Hydrogen ions H+ as their money.
Strong Acids (The Generous Billionaires): When you drop H2SO4, HCl, or HNO3 into water, they immediately give away 100% of their H+ ions. The scientific word for this is being highly ionized or completely dissociated.
Weak Acids (The Stingy Billionaires): When you drop Ethanoic acid (vinegar) or H2SO3 into water, they hold tightly onto their money. They only release about 1% of their H+ ions and keep the rest locked up. They are only partially ionized.
