Principle
Strips of indicator paper soaked in potassium nitrate solution are spanned between two copper electrodes inside a ribbed trough. A drop of hydrochloric acid or sodium hydroxide is dripped onto the middle of these strips. When a voltage is applied, it can b ...
If a sub-layer of copper (II) sulphate and potassium hexacyanoferrate (III) is introduced into a solution of ammonium hydroxide and ammonium sulphate in a U-tube with the help of a suspended level bulb (dry vessel) and a DC voltage is applied, it can be se ...
The movement of ions is responsible for current flow in solutions of electrolytes. The migration of coloured ions can be easily observed by the migration of the colour front in an electric field.
Tasks
Demons ...
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