finishing.com -- The Home Page of the Finishing Industry

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
Live! From beautiful Pine Beach New Jersey: Welcome to the world's most popular metal finishing website

topic 17067

Scientific [chemical] reaction of hydrochloric acid and copper


2002

I'd like to explain, to a 6th grade class, what is going on when we rub hydrochloric acid over their copper rubbings. Thank you for your help.

Joan Russell
- Bellevue, Washington


2002

I don't know quite what a "copper rubbing" is or what happens to it. In theory, though, hydrochloric acid does not dissolve copper but it does dissolve copper oxides.

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


August 29, 2009

We have been doing descaling of copper shell and tube condensers with hydrochloric acid. what will be the reaction copper tubes? advise what precautions should be taken

RAJ K VERMA
end user - gurgaon haryana india


August 31, 2009

Hi, Raj. The reaction is actually pretty simple: HCl acid dissolves copper II oxide --

CuO + 2 HCl => CuCl2 + H2O

But as for "what precautions should be taken", sorry, but there is no way to answer that loaded question in the abstract. Good luck.

Regards,

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


February 8, 2011

Our condenser tube material is Copper; it is choked by strong Ca and silica. Very hard scale.
We were trying to clean it by Hydrochloric Acid, but only 10% was removed. Can I use Hydrofluoric Acid (HF) to remove this strong silica scale?

Anwar Hossain
- Dhaka, Bangladesh

February 8, 2011

Hi, Anwar. HF should be strong enough to dissolve silica scales BUT if you have to ask, you may not have had sufficient training. HF is horrendously dangerous. Don't even touch it if you have not had hands-on training in its application. It is deadly; it attacks bones so painfully that you may wish you were dead; and it can anesthetize early on so you are unaware that you have been exposed. Among other issues, dangerous amounts of CO2 gas may be produced, causing expulsion of the acid at unexpected time or in unexpected direction.

Regards,

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



If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2019 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.