Question

add 5 ml dilute hydrochloric acid to piece of magnesium taken in a test tube.why does the test tube get warm

Answer 1

Answer:

1. A reaction takes place between Magnesium (Mg) and Hydro Chloric Acid.

2. The reaction is Mg + 2HCl --> MgCl2 + H2.

3. This reaction is exothermic, i.e. that the reaction releases heat due to a loss of energy in the system.