A mixture of soluble chemicals added to soil that replace the mineral ions needed by plants, to promote plant growth.

A term used to describe when nutrients accumulate in bodies of water, which results in an increased growth of microorganisms that reduce the oxygen availability in the water.

An ionic compound formed from positive and negative ions electrostatically attracted to each other.

A manufacturing method made up of discrete stages, rather than a product being constantly produced.

A manufacturing method where a product is constantly produced.

NPK fertilisers, agriculture and other applications

Chemistry

In the Rates and energy changes unit, pupils learned about how energy changes are always involved in reaction, along with a range of methods for measuring and comparing rates of reaction using properties of reactants and/or products.

Industrial chemistry

Mixture of soluble chemicals added to soil to replace mineral ions

Process where nutrients accumulate in a body of water, removing oxygen

Manufacturing process made of discrete stages or steps

Manufacturing process where a product is constantly produced

A raw material used to provide reactants for an industrial reaction

Match the following terms to the correct definition.

NPK fertilisers contain {{}}, phosphorus and potassium compounds to promote plant growth.

Which of the following are uses of nitrogen in plants?

Phosphate rock is chemically treated in the production of ammonium phosphate

Phosphate rock cannot be used as fertiliser

Which of the following statements about phosphate rock is **not** correct?

Which acid reacts with ammonia to make ammonium nitrate, NH₄NO₃?

React ammonia and acid in a conical flask

React an acid with ammonia using titration

Which of the following are used in the laboratory production of ammonia salts, but not in the industrial production of ammonia salts?

Name the industrial process used to make ammonia.

Dissolves in water to form an acidic solution

Dissolves in water to form an alkaline solution

Which of the following are properties of ammonia?

Nitrogen reacts with hydrogen to form ammonia. Which of the following shows this balanced chemical reaction?

When the symbol ⇌ is used in an equation it means that the reaction is {{}}.

All the nitrogen and hydrogen are used in the reaction

What happens to the unreacted hydrogen and nitrogen gases used in the Haber process?

This lesson will be removed by end of Summer Term 2025.

NPK fertilisers, agriculture and other applications

Lesson outcome

This lesson will be removed by end of Summer Term 2025.