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Q: What is the purpose of adding phosphoric acid in the fe titration?
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Role of phosphoric acid in dichrometry titration?

The phphoric acid is used to form stable complexes with Fe3+ ion


How can you calculate the concentration of a phosphoric acid solution from the titration with sodium hydroxide?

With a calculator. That is the easiest way.


Why does a cola soft drink need to be decarbonated to perform a phosphoric acid titration?

Because carbon dioxide in water is a mild acid and will react with the sodium hydroxide making accurate titration impossible.


Why is ortho phosphoric acid used in titration?

Phosphoric acid is used in titraions involving Iron(III) ion. Ferric ions are not stable in aqueous medium. It forms a stable complex with phosphate ions.


How much acid is in Dr. Pepper?

There is about 0.32% phosphoric acid in diet cola. I just did an experiment and those were my results using NaOH in a titration.


Why you use phosphoric acid during permanganometry titration?

Phosphoric acid is used because it tends to lessen any interfering colour changes. Also due to the presence of phosphoric acid ( the phosphate complex of Fe 3+ is colourless , so the yellow colouration of Fe 3+ ions does not disturb the end point detection.


Why do you have to heat up the solution of oxalic acid after adding sulphuric acid for the titration with permanganate?

To act as a catalyst


What is the purpose for using phenolphthalein for an acid base titration?

It's the colour indicator you watch for during the titration.


What is the purpose of a titration experiment?

To deduce the concentration of a unknown solution from a known solution. Acid/base titration are common.


Is poly phosphoric acid different from phosphoric acid?

I don't think so.poly phosphoric acid and phosphoric acid have same moleculer structure.http://harvestchem.iblogger.org


What is the reaction of phosphoric acid with nitric acid?

phosphoric acid


What is H3PO4?

H3PO4 is the formula for phosphoric acid, also called orthophosphoric acid. For details see: http://en.wikipedia.org/wiki/Phosphoric_acid