Science

ammonia buffer

How do you make ammonia buffer pH 13 ?

Lily69 Thurs 28/08/08 10:02

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EDDIE51
Thurs 28/08/08
18:47

This link gives the make up for Buffers from 1 to 13.
You have to scroll down a bit for the pH 13 range.
http://delloyd.50megs.com/moreinfo/buffers2.ht ml

EDDIE51
Thurs 28/08/08
19:05

As far as I know Ammonia Buffer is only up to pH 10.
You need Sodium or Potassium Hydroxide to get as high as pH 13. Here is a link to a company that supplies pH 13 buffer ready to use (still Hydroxide based though)
http://www.sigmaaldrich.com/catalog/search/Tab lePage/19822373

EDDIE51
Thurs 28/08/08
19:46

As I thought, you can not make a pH 13 buffer with ammonia it is only a 'weak' base, that pH range needs a 'strong ' base. See this link for details of weak and strong bases.http://en.wikipedia.org/wiki/Base_(chemistry)

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