Sulphuric acid
Oleum is more stronger acid than Sulfuric acid
Oleum is typically produced by dissolving sulfur trioxide (SO3) in concentrated sulfuric acid (H2SO4).
Oleum, also known as fuming sulfuric acid or pyrosulfuric acid, is a solution of sulfur trioxide (SO3) in concentrated sulfuric acid (H2SO4).
By dissolving Sulfur trioxide in concentrated Sulfuric acid
The traditional name for fuming sulfuric acid is Oleum. Oleum is used for in water based aerosol coatings. Rust-Oleum has the fuming sulfuric acid in its name and hold many patents on its usage.
OLEUM
oleum
Formula: H2S2O7
Dissolve excess Sulfur trioxide in concentrated Sulfuric acid
The traditional Latin name for fuming sulfuric acid is Oleum. It comes from the Latin word for oil (oleum). It is also called Nordhausen acid.
Simply a dilution of the same acid.
Dilution of a strong acid will create a weaker acid.