fertilisers

• Fertilisers - the 3 essential elements for healthy plant growth are - Nitrogen, Phosphorus and Potassium (N,P,K)
• fertilisers must be soluble so they can be absorbed by the roots an must contain at least one of the N, P, K elements
• the Haber process is the process of combining nitrogen and hydrogen to make ammonia
• ammonia - has a pungent smell, soluble in water, clear colourless gas
• the symbol equation for ammonia (Haber process ) - N2 + 3H -> 2NH3
• the Oswald process is the process of combining ammonia and oxygen to produce nitric acid
• Oswald process word equation - ammonia + oxygen -> nitric acid
• the symbol equation for the oswald process is - NH3 + 2O2 -> HNO3 + H2O
• fertilisers are typically made by reacting an acid with a base to produce a salt and water