Question

Student adds dilute sulphuric acid to lime water 2 reaction in mixture became water called by students add dilute sulphuric acid tooling lime water the reaction is mixture became hot or cold? Why

Answer 1

When dilute sulphuric acid is added to lime water (calcium hydroxide), calcium sulphate is formed. Also, heat is released in the process and so the reaction mixture becomes hot. Following is the chemical equation showing the reaction.
H2SO4 + Ca(OH)2 ----------> CaSO4 + H2O