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The solution must not be put down the drain because of residual copper ions left in it. To make it safe for disposal, you can add sodium carbonate (washing soda) or sodium hydroxide to neutralize it, until the pH value goes up to between 7.0 and 8.0, testing it with indicator paper.
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Jul 5, 2022 · It cannot be poured down the drain but instead must be neutralized with sodium carbonate (washing water) or sodium hydroxide.
Jul 29, 2006 · Ferric chloride can be stored in plastic bottles. After its etching properties are spent, simply mark the bottle as such and ready it for your local hazardous ...
Dec 10, 2017 · Copper chloride can be disposed of by adding sodium carbonate and/or sodium hydroxide to the ferric chloride to precipitate the copper and iron.
Oct 8, 2022 · Disposal Cliff's Notes, neutralize with baking soda, allow the solids to settle out, pour the liquid down the drain, and dispose of the iron and ...
You can keep recycling your ferric chloride solution indefinitely, too, by using it to copper electroplate metal objects. It's very straightforward, and you can ...