12. Write equations for the preparation of potassium sulphate; of potassium acid carbonate.
ROBERT WILHELM BUNSEN (German) (1811-1899)
Invented many lecture-room and laboratory appliances (Bunsen burner); invented the spectroscope and with it discovered rubidium and cæsium; greatly perfected methods of electrolysis, inventing a new battery; made many investigations among metallic and organic substances
13. What weight of carnallite would be necessary in the preparation of 1 ton of potassium carbonate?
14. Write the equations showing how ammonium chloride, ammonium sulphate, ammonium carbonate, and ammonium nitrate may be prepared from ammonium hydroxide.
15. Write an equation to represent the reaction involved in the preparation of ammonia from ammonium chloride.
16. What substances already studied are prepared from the following compounds? ammonium chloride; ammonium nitrate; ammonium nitrite; sodium nitrate; sodium chloride.
17. How could you prove that the water in crystals of common salt is not water of crystallization?
18. How could you distinguish between potassium chloride and potassium iodide? between sodium chloride and ammonium chloride? between sodium nitrate and potassium nitrate?