No passwords, No popups, No cost, No AI:
we earn from 'affiliate link' purchases, making the site possible

Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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

  The authoritative public forum
  for Metal Finishing since 1989

-----

Help with percent composition

Ok- I understand how to do percent composition except:

If you have CuSO4 . 5H2O, do you distribute the 5 to the H2 and get 10 H atoms and then distribute it to the O and get 5 O atoms?

Nicole S.
student - Falls Church, Virginia
2005

Technically, the dot 5H2O means that you have 5 molecules of water mechanically attached (water of hydration) to the copper sulphate. For most calculations, you would consider it as water rather than atoms of H and O. You do consider it in the weight when you are trying to weigh out an amount of the hydrated material to get a given amount of the copper or the copper sulphate ⇦ this on eBay or Amazon [affil links] or the sulphate.

James Watts
- Navarre, Florida
2005

(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: