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Also part of:
Student set General Chemistry for 25 experiments, TESS advanced Chemistry CH-1
Article no. 25300-88 | Type: Set
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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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