The combining Ratio of Zinc and Oxygen

Zinc and zinc oxide are both substances the weights of which can be determined accurately, so that the quantity of oxygen which is combined in the oxide can be found by difference. To convert quantitatively a definite amount of zinc into the oxide by means of direct combination with oxygen would be a difficult operation but the same result is accomplished indirectly by first treating the metal with nitric acid to obtain the nitrate and then decomposing the zinc nitrate by heat, which leaves a residue of zinc oxide. 

Materials zinc, chemically pure, about 20 mesh, nitric acid, 6 N. 

Bunsen burner, triangle, nichrome wire, iron ring and ring stand. 

Copy the following form on the left-hand page of your note 

---