Sulfuric acid is oily and colorless liquid. It is soluble in water in all proportions. Adding water to sulfuric acid produces a large amount of heat. Bumping of the acid occurs due to excessive heat and the glass vessel may break or explode.
For this reason, water is never mixed with acid. To dilute the concentrated acid, the concentrated acid is mixed in cold water by stirring it slowly with a glass rod. It is a strong acid. Hence it is also a corrosive material. When it falls on the skin, it puts painful blisters on the skin.
The concentration of sulfuric acid used in the laboratory is 98.5 percent by weight. Its relative density is 1.84 and its normality is 36N. Its boiling point is 338°C. The norlity of dilute sulfuric acid used in the laboratory is 5 N.