2. REVISION C4 1 st Half!

4. An acid can be neutralised by adding a ______ or an ______ to it. An _______ is a soluble _______. An alkali can be neutralised by adding an ______ to it. (5) ACID ALKALI BASE ALKALI BASE

5. Sulfuric acid + magnesium oxide  ______ + _______ (2)

6. Hydrochloric acid + Copper _____  _______ + ______ + carbon dioxide (3)

7. What ions are present in (i) all acids and (ii) all alkalis. Use this information to show why water is always formed. (3)

8. What are the 3 main chemical elements that plants need? (3)

9. Why do plants need nitrogen and what can be added to soil to increase the amount of these elements are present? (2)

10. Describe the process of eutrophication as 5 main stages? (5)

11. Which acid and base are needed to make the following fertilisers; ammonium sulfate and ammonium. (4)

12. Give a balanced symbol equation to represent the Haber process and state what conditions are used. (4)

13. Haber process - Why is 450 o C a compromise temperature? (3)

14. Haber process - Why is 200atm a compromise pressure? (3)

15. What happens to any unused reactants in the Haber process? (1)