Bunsen cell
The Bunsen cell is a zinc-carbon primary cell (colloquially called a "battery") composed of a zinc anode in dilute sulfuric acid separated by a porous pot from a carbon cathode in nitric or chromic acid. == Cell details == The Bunsen cell generates about 1.9 volts which arises from the following reaction: Zn + H2SO4 + 2 HNO3 ⇌ ZnSO4 + 2 H2O + 2 NO2(g) According to the reaction above, when 1 mole (or part) each of zinc and sulfuric acid react with 2 moles (or parts) of nitric acid, the resultant products formed are, 1 mole (or part) of zinc sulfate and 2 moles (or parts) each of water and nitrogen dioxide (gaseous, in the form of bubbles).