Metal finishing Q&As since 1989

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Plating from Malachite / Copper Sulphate

Q. If we place electrodes into copper sulphate [on eBay or Amazon] and connected them to a supply, a pink deposit forms on the anode. What is the pink deposit?

How do we test for the presence of gas?

This is just starters I have 4 more like this
HELP!

Anna
student - Ottershaw, Surrey, England
2007

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2007

What course are you taking and what are you supposed to be getting from it, Anna? What is the name of the textbook and lab book associated with this course? People will usually help when you are unable to find the necessary resources, but we're not here to do your homework for you.

But I can tell you that the salmon-color deposit will be on the cathode, not the anode. Also, although you can probably see the little gas bubbles, which will look like those in carbonated soft drinks, it probably isn't intuitively obvious how to quantify this presence of gas, and figuring it out is probably not part of your assignment. So the way to do it is to immerse a proper shape glass bottle under the solution level until it is filled; then you invert it so it's open-side-down. Then you place it over the area where the gas is being generated so any gas rises into the bottle and displaces solution from the bottle. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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2007

Anna
Malachite is a green mineral which contains copper but it is not copper sulphate. It appears in the title of your question but not in the question itself. What is the connection?

Geoff Smith
Hampshire, England