U-TubeU tube filled with a sodium hydroxide is used for a cleaned and dried gas. U tube filled with a 1 mol dm 3 aqueous potassium nitrate solution is used as a permanent salt bridge. U tube is a device used for water electrolysis, for laboratory hydrogen and oxygen obtaining.
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U-tubefilled with a sodium hydroxide is used for a cleaned and dried gas.U-tube filled with a 1 mol dm-3aqueous potassium nitrate solution is used as a permanent salt bridge.U-tubeis a device used for water electrolysis, forlaboratoryhydrogen and oxygen obtaining.