(a) The head of a safety match contains KClO₃ and this reacts with red phosphorus which is combined with glass powder on the side of the match box. Write an equation for the reaction that occurs when the match is struck. Show that changes in oxidation states balance. Comment on the role of the glass powder.

(b) In a ‘strike-it-anywhere’ match, the match head contains P₄S₃ and KClO₃. Use oxidation state changes to suggest what happens when you strike the match, assuming that additional O₂ is required for combustion.