Question

Q.15) What conditions should be respected in order to carry out the precipitation
titration? (1 marks)
Ans.
Solution should be supersaturated E.
Heating is required
Reaction of a precipitation formation
should be very slow
the precipitate should be practically
insoluble
Reaction of a precipitation formation
shold be fast​

Answer 1

Answer:

The Mohr titration should be carried out under conditions of pH 6.5 – 9. At higher pH silver ions may be removed by precipitation with hydroxide ions, and at low pH chromate ions may be removed by an acid-base reaction to form hydrogen chromate ions or dichromate ions, affecting the accuracy of the end point