Preparation of Sulphuric Acid by the Chamber Process

Preparation of Sulphuric Acid by the Chamber Process. Assemble an apparatus shown in Fig. 73. Spill sodium bisulphite into flask 1 and pour a 70% sulphuric acid solution into funnel 2. Put copper 

Open the cock of funnel 4 and add nitric acid dropwise. As soon as flask 7 is filled with nitrogen(lV) oxide vapour (the colour must be very intensive), open the cock of funnel 2 and add sulphuric acid dropwise into flask 1. Watch the change in the colour. What crystals are deposited on the walls of flask 7 Using rubber bulb S, add 

2-3 ml of water into flask 7 and rinse its walls. What happens to the crystals What gas fills the flask now  

Open the stopper of flask 7 and watch the change in the colour of the gas. Again add 2-3 ml of water, rinse the flask, and pour out the liquid into a beaker. Prove that a solution of sulphuric acid has been prepared. What impurities does the acid contain Write the equations of all the occurring processes. 

What industrial processes exist for the production of sulphuric acid How can the purest acid be produced  

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