No registration, no passwords; no pop-up ads -- just aloha, fun, & authoritative answers.
As an eBay Partner & Amazon Affiliate we receive compensation for qualifying purchases.
Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub  Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

Copper sulphate, equation for decomposition



 

What is the chemical equation for the decomposition of copper sulphate [on eBay or Amazon affil link]pentahydrate?

Sarah Mendlovitz
- Greensboro, North Carolina



The pentahydrate is 100% isolable only in temperatures lower than 30 °C. The light blue trihydrate non-isolable form can be obtained around 30°C. White monohydrate form is available at 110°C, while the anhydrous form can be isolated near 250°C. The decomposition slightly starts at 250 degrees, while complete decomposition occurs around 600 degrees...

The reaction is as follows: CuSO4 (aq) ==> SO2(g) + CuO(s)

Meriçcan Usta
Ted Ankara College - Ted Ankara College, Turkey
 


2006

Hi, I'm a student at Townsville grammar school in QLD and we're doing a practical on changing copper carbonate to copper (II) sulphate and I was wondering where you got your information about copper (II) sulphate and the degrees it decomposes at;

"At 30°C the light blue tri-hydrate is formed, at 110°C the monohydrate is formed and at 250°C the anhydrous is formed. At 250°C the copper sulphate slightly decomposes however it does not fully decompose till 600°C."

thanks a lot

Courtney J.
student - Townsville, Queensland, Australia



When copper sulphate is analysed through TGA (Thermogravimetric analysis) it goes as per the literature by losing the water of hydration step by step.

Then, if we continue further, say at around 450 °C there is sudden decrease in weight% of about 13%. So I am doubting whether it is due to decomposition of anhydrous copper sulphate or noise in TGA.

Arunagiri Sachin
- Chennai, Tamilnadu, India
December 6, 2008




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully 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 might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"