Chapter 9 Reversible reactions and equilibrium

3. the mixture of reactants and products at which a reversible reaction is in equilibrium under a particular set of physical conditions of temperature and pressure
4. a system where none of the reactants or products can escape the reaction mixture or the container where the reaction is taking place
6. fertilisers to provide the elements nitrogen, phosphorus and potassium for improved plant growth
7. an adjective to describe a substance without water combined with it
11. a chemical reaction that can go either forwards or backwards, depending on the conditions
12. a temperature that gives sufficient product and a reasonable and economic rate of reaction

1. two chemical reactions, one the reverse of the other, taking place at the same time. where the concentrations of the reactants and products remain constant because the rate at which the forward reaction occurs is the same as that of the reverse reaction
2. the industrial manufacture of sulfuric acid using the raw materials sulfur and air
5. a fertiliser such as an NPK fertiliser or nitrochalk that contains more than one compound to provide elements to the soil
8. an industrial process for removing contaminating sulfur from fossil fuels such as petrol (gasoline) or diesel
9. a substance added to the soil to replace essential elements lost when crops are harvested, which enables crops to grow faster and increases the yield
10. salts whose crystals contain combined water (water of crystallisation) as part of the structure