What do you observe when water is mixed with acid or base?

[prasanna]

Experiment:

1. Take 10 ml water in a beaker.
2. Add a few drops of concntrated H_{2}SO_{4} to it and swirl the breaker slowly.
3. Touch the base of a beaker,
4. The base is hot.
   Result:
   This is an exothermic process called as dilution.