Answer to Question #3004 in Inorganic Chemistry for priscilla
Then there is dehumidifier.
The hole of it is enclosed by cotton and then you need to fill it with SaCl2 or CuSO4.
The current source - any such battery or multiple connected batteries.
Do not forget about safety: chlorine is dangerous even in small quantities! Therefore, experimenting in the laboratory under a hood or, in extreme cases, in the yard.
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