Copper (II) chloride is a hazardous substance. The copper (II) chloride is the biggest reason to not pour your etched copper down the drain, but there should not be much of that left over after the solution is reduced. The copper could be a problem if there were some other residues that had copper/copper salts in them.

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2020年3月30日 · The zinc chloride cell is an improvement on the original zinc–carbon cell, using purer chemicals and giving a longer service life and steadier voltage output as it is used. These cells are usually marketed as heavy-duty, extra-heavy-duty, or even super-heavy-duty batteries, and offer about twice the service life of general purpose zinc ...

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2013年1月23日 · Leaving it on would use more energy, absolutely. Sometimes, people try to convince themselves that turning a light on and off uses more energy because there is some high inrush current, or some such thing.

2014年12月3日 · This is certainly possible, but a few things to keep in mind: Rosin flux residue often isn't water soluble. For cleaning after assembly, water is not generally effective

2012年2月25日 · And back in the day, a chemistry prof I worked for as an undergrad thought we could get the plastic off ribbon cable using methylene chloride, AKA dichloromethane (DCM), which is known to be effective as a powerful paint stripper.

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2022年1月12日 · Until the last years, my knowledge was that the rechargeable analogue of the 1.5 V batteries have only 1.2 V. This greatly decreased their usability (many devices did not work well with 1.2 V

2017年7月1日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.