H2SO4 is sulfuric acid and is acidic. It is one of 8 or so "strong acids," meaning it dissociates completely into H(+1) and SO4(-2) ions. It will have a pH value close to zero.
SO3 is an acidic oxide. It reacts violently with water to form sufuric acid, H2SO4
acidic.
basic or acidic
Acidic
Acidic
its acidic
acidic
Not in and of itself, but it readily reacts with water to form sulfuric acid, H2SO4
acidic
Acidic
The solution is acidic.
It is acidic