Test confirming the migration of ions by means of indicatorpaper

Article no. P7152100 | Type: Experiments

grades 7-10 , grades 10-13
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Student set General Chemistry, TESS advanced Chemistry

Article no. 25300-88 | Type: Set

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Student set General Chemistry digital, TESS advanced Chemistry

Article no. 25300-88D | Type: Set

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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