d PREPARE SULPHUR DIOXIDE Do the following preparations in a fume cupboard i Prepare sulphur dioxide by burning sulphur in air Put powdered sulphur in a porcelain jar ignite it and collecting the gas formed in a funnel Aspirate the gas into a bottle containing water ii Prepare sulphur dioxide in a generator which allows dilute sulphuric or hydrochloric acid to drip slowly on to sodium sulphate The acid is contained in a thistle funnel and a tap controls the flow on to sodium sulphite in a suitable flask The sulphur dioxide produced can be collected in gas jars covered with cardboard discs which have central holes for the delivery tube