Re: Standardizing NaOH and HCL




vinic@xxxxxxxx wrote:
I recently found data pertaining to the pH level of certain
concentrations of NaOH. Specifically, 0.01 N of NaOH is suppose to be
at a pH of 12. Seems like this would be a way to standardize the
solution. Does anyone in this group know why this isn't common
practice?

tia
clyde

I can't remember off the top of my head but there is some other thing -
potassium phtalate maybe? - that's used to standardize AFAIK. Iverson
talks about it in his book.

BUT - why wouldn't this work - make a solution of say 10g TA in 1L
distilled water and titrate that. The error from 10g/L TA should give
the adjustment to the measured TA value in wine with this solution, no?
Or does it matter that one solution is water and the other wine?

Pp

.



Relevant Pages

  • Re: acid titration
    ... My Analytical chemist gave my NaOH from 2006 and said it will be fairly ... It shouldn't make a big difference cause wine makers are going ... require x ml's of .1 NaOH equals the tartaric acid level. ... there is no substitute for a hard cover note book ...
    (rec.crafts.winemaking)
  • Re: Titrating for TA: using a pH meter to find the end point
    ... I add 5ml of wine to a flask, add 50ml of distilled water and the pH reads 3.6. ... It took about 4.7 ml of NaOH to get to 8.2, ... I used commercial wine for this experiment, ... which means that the TA is 4.3 g/l as tartaric. ...
    (rec.crafts.winemaking)
  • Re: acid titration
    ... How long is NaOH solution good for? ... require x ml's of .1 NaOH equals the tartaric acid level. ... "For a red wine do not immediately add the phenolphthalein indicator as ... there is no substitute for a hard cover note book and ...
    (rec.crafts.winemaking)
  • Re: acid titration
    ... x ml's of wine require x ml's ... of .1 NaOH equals the tartaric acid level. ... I can give you their method to standardize sodium hydroxide with potassium ...
    (rec.crafts.winemaking)
  • Re: Standardizing NaOH and HCL
    ... 0.01 N of NaOH is suppose to be ... Seems like this would be a way to standardize the ... the adjustment to the measured TA value in wine with this solution, ... probably good enough - at least for TA measurements. ...
    (rec.crafts.winemaking)