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Passivation bath titration calculations

Anyone have the formulas for calculating %v HNO3 and %wt Na2Cr2O7 using 1.0 N NaOH [1N NaOH on Amazon [affil links] and 0.1N sodium thiosulphate ⇦ this on eBay or Amazon [affil links] ? I've been using the same ones for the past 20 years. They work. But I don't remember how I calculated them or where I found them.

Steven Crest
engineer - Covina, California, USA
2006

2006

Steven,
Please give your analytical procedures -- to get comments & to answer letter 39558.

Ken Vlach [deceased]
- Goleta, California

Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.

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