Sulfuric acid Flashcards
1
Q
Contact process
A
- S + O2 -> SO2 ( furnace )
- 2SO2 + O2 -> 2SO3 ( catalytic converter )
- SO3 + H2SO4 -> H2S2O7 ; oleum ( absorber )
- H2S2O7 + H2O -> 2H2SO4
Conditions
- V205 catalyst
- 450^C
- 1atm
2
Q
Properties of SO2
A
- colourless gas
- choking & irritating smell
- acidic gas
- reducing agent ( anti-oxidant )
- bleaching agent
- poisonous gas
3
Q
Uses of SO2
A
- industrial bleaching agent
- making of paper
- food preservative
- manufacture of H2SO4
- refrigerant
4
Q
Uses of H2SO4
A
- making of paints & detergents
- making of fertilisers like ammonium sulfate
- car batteries
- jewellery
5
Q
Properties of dilute H2SO4
A
- reacts with metals to liberate H2 gas with effervescence
- reacts with carbonates to liberate CO2 with effervescence
- neutralises bases & alkalis
6
Q
Properties of H2SO4
A
- oxidising agent
- dehydrating agent
- can be used as drying agent for many gases except ammonia gas.
