Test confirming the migration of ions by means of indicatorpaper

Article no. P7402400 | Type: Experiments

grades 7-10, grades 10-13
10 Minutes
10 Minutes
easy
Pupils

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 be seen how the ions migrate along the paper.

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