Ammonia & Sulfuric Acid Flashcards
What’s the formula for ammonia
NH3
What’s a use of Ammonia?
Fertilisers
Where does nitrogen come from in Haber process?
Air
Where does hydrogen come from in Haber process?
Obtained by reacting natural gas with steam or cracking oil fractions
Temperature in Haber process?
450°C
Effect of increasing pressure in Haber process?
More yield
Catalyst in Haber process?
Iron
How do you separate ammonia from unreacted nitrogen and hydrogen?
By cooling and compressing
What is produced when Ammonia is oxidised?
Nitric Acid ; HNO3
What are the essential elements found in most fertilisers?
Nitrogen, phosphorus, potassium
In the contact process, what are the raw materials needed for the production of sulfuric acid?
Sulfur, air and water.
How do you make Sulfur dioxide?
Burn Sulfur in air
Why must Sulfur dioxide NOT be released into the atmosphere?
It produces acid rain
What is produced when Sulfur dioxide is oxidised?
Sulfur trioxide
What is the catalyst in the contact process?
Vanadium (v) Oxide - V2O5
What’s the temperature for the contact process?
450°C
What’s the pressure for the contact process?
2 atm
How do you make sulfuric acid from Sulfur trioxide?
React Sulfur trioxide with water:
H2O + SO3 -> H2SO4
List 3 uses of sulfuric acid
- fertilisers
- detergents
- paints
When does acid rain occur?
When fossil fuels are burnt which have Sulfur impurities in them.
What can acid rain lead to?
- High levels of acidity in lakes (kills fish)
- Ruins Limestone buildings and statues
