2. Calderglen High School 1111 2222 3333 4444 5555 6666 7777 8888 9999 10

3. Calderglen High School Is nitrogen gas reactive or unreactive? unreactive 1 answer

4. Calderglen High School Name the three essential elements required for healthy plant growth Nitrogen (N) Phosphorus (P) Potassium (K) 2 answer

5. Calderglen High School nitrogen Calculate the percentage mass of nitrogen in NH 4 NO 3 Formula mass = 14 + 4 + 14 + (3x16) = 80 % N = 28/ 80 x 100 = 35% 3 answer

6. Calderglen High School Describe the appearance of ammonia. Colourless gas, pungent smell. It is also soluble in water and turns damp pH paper/universal indicator blue 4 answer

7. Calderglen High School Why are fertilisers added to the soil? To replace nutrients/essential elements /nitrogen, potassium or phosphorus 5 answer

8. Calderglen High School What negative effect can artificial fertilisers have on lochs and rivers? Make them lifeless 6 answer

9. Calderglen High School Which of the following compounds would be suitable fertilisers? Copper chloride, ammonium nitrate, calcium phosphate (must have N, P or K AND be soluble in water) Ammonium nitrate - contains nitrogen / soluble Copper chloride - does not contain essential elements Calcium phosphate - is insoluble 7 answer

10. Calderglen High School Name the two types of compounds which can be used to make ammonia in the lab. An ammonium compound and an alkali An ammonium compound and an alkali eg. Ammonium chloride and potassium hydroxide or ammonium carbonate and soda lime 8 answer

11. Calderglen High School What colour does ammonia turn damp pH paper? Bluepurple Blue/purple (It is an alkaline substance) 9 answer

12. Calderglen High School Give an advantage of using fertlisers? Larger yield of crop. 10 answer