Question

A piece of burning magnesium ribbon was plunged into a gas jar containing sulphur (IV) oxide.

1. What observation was made? 
2. Write an equation for the reaction taking place.
3. What property of sulphur (IV) oxide is investigated above.

Answer 1

1. A yellow deposit of sulphur is observed and a white powder of MgO formed.
2. 2Mg_(s)  +  SO_2(g)  → 2MgO_(s) + S_(s) 
3. Oxidising agent/property