Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
-----
How to find the concentration of nitric acid by volumetric titration?
April 17, 2009
dear sir
Commercially I am buying the acids and sub boiling the acids at 70 degrees. So I need to know how much concentration would be there after sub boiling, I need a method of finding the concentration.
Thank you
employer - India
For some reason, just a gut feeling I guess, I doubt if you will get a significant concentration by sub boiling, unless you cook it for a very long time.
Find a school chemistry teacher to help you get started. If the acid has any metal at all dissolved in it, you need to use a 0.5N sodium hydroxide
⇦ this on
eBay
or
Amazon [affil links]
or 0.1N
⇦ this on
eBay or
Amazon [affil links]
titrant with strong agitation and a slow addition or you will use some of the titrant in dropping out the metal as a metal hydroxide. It is very slow to redissolve. You should also use an indicator such as methyl red
⇦ this on
eBay &
Amazon [affil links]
or methyl orange
⇦ this on
eBay or
Amazon [affil links]
. phenolphthalein will cause a problem. If there is zero metal, then it does not matter very much what strength titrant or indicator that you use. Note, you do need to dilute your acid sample with about 100 ml of distilled water. Add the acid to the water.
- Navarre, Florida
April 21, 2009
Q, A, or Comment on THIS thread -or- Start a NEW Thread