The Haber Process

Question 1

The Haber process

Answer 1

Nitrogen + hydrogen <—> ammonia
N2(g) + 3H2(g) <—> 2NH3 (g)

Question 2

The Haber Process conditions

Answer 2

200atm - High pressure shifts equilibrium to the side with fewer moles so more product (ammonia) is formed. However, if pressure is too high it’s dangerous (risk of explosion).

450°c - Low temperature shifts equilibrium to increase the temperature, favouring the exothermic direction and so more product is formed. However, low temperatures decrease rate of reaction so a balance is made between rate and yield. We can use an iron catalyst to speed up reaction.

Question 3

Fertiliser

Answer 3

A chemical or natural substance added to soil or land to improve growth of plants

Question 4

Making fertilisers in the lab

Answer 4

Titration and crystallisation
2NH3 + H2SO4 —> ((NH4)2)SO4
-small scale
-glass pipette and burette
-dilute