reaction between magnesium and dilute sulphuric acid

Observations :
1. Colourless bubbles are formed.
2. The magnesium dissolves.
3. Heat is given off to make the test tube feel warm.
4. A colourless solution is formed. Therefore, there is no change in the colour of the solution.
5. A pop sound is heard when the gas formed (in 1) is collected and tested with a burning splint.

Equations :
Mg(aq) + H2SO4(aq) → MgSO4(aq) + H2(g)
or : Mg(aq) + 2H+(aq) → Mg2+(aq) + H2(g)