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-----Why dilute copper sulphate with vinegar for electroplating?
what effect does vinegar ⇦ in bulk on eBay or Amazon [affil link] have on electroplating [since most experiments ask us to dilute copper(II) sulphate with vinegar?
Charlenestudent - Singapore
2005
It's hard to guess what the textbook author may have had in mind, especially when we haven't seen the experiment, but vinegar is a very mild acid and will help the copper stay dissolved and help provide conductivity as the copper sulphate ⇦ on eBay or Amazon [affil link] is diluted.

Ted Mooney, P.E.
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finishing.com - Pine Beach, New Jersey
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2005
It would normally be used because it is significantly safer for students to use than sulfuric acid. A plus is that it will form a copper acetate complex and tend to give you a tiny bit more uniform plating in the low current density areas.
James Watts- Navarre, Florida
2005
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