1. Describe the manufacture of sulphuric acid by the Contact process, including essential conditions.
The manufacture of sulphuric acid is called the Contact Process and this is the process: firstly, you need to burn sulphur in oxygen to create sulphur dioxide. The sulphur dioxide is then passed over a vanadium pentoxide catalyst to form sulphur trioxide. Essential conditions for maximum yield of sulphur trioxide is 450°c and a moderate amount of atmospheric pressure. The sulphuric trioxide is then dissolved in water to produce sulphuric acid.
Here's how it goes with symbol equations:
1. sulphur + oxygen --> sulphur dioxide
S + O2 --> SO2
2. sulphur dioxide + oxygen --> sulphur trioxide (vanadium pentoxide catalyst, 450°c, atmospheric pressure)
SO2 + O2 --> SO3
3. sulphur trioxide + water --> sulphuric acid
SO3 + H2O --> H2SO4
2. Describe the properties of dilute sulphuric acid as a typical acid.
● eats away and dissolve objects
● readily absorbs moisture
● corrosive
● reacts with bases
● doesn't conduct electricity
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