1.Combining of sulfur and oxygen to form sulfur dioxide
2.Purifying the sulfur dioxide in a purification unit
3.Adding an excess of oxygen to sulfur dioxide in the presence of the catalyst vanadium pentoxide at 450 °C and 1atm
4.The sulfur trioxide formed is added to sulfuric acid which gives rise to oleum (disulfuric acid)
5.The oleum is then added to water to form sulfuric acid which is very concentrated.
Mr Masinde answered the question on May 5, 2018 at 09:20
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