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1
The details of the method are as follows: A solution of
manganous
sulphate
slightly stronger than No.
2
Finally, the excess of
manganous
sulphate
is determined, in the manner described by Volhard, by means of solution No.
3
It is, however, possible to obtain a satisfactory, although somewhat fugitive end-point in the presence of
manganous
sulphate
and phosphoric acid.
4
[Note 1: The
manganous
sulphate
titrating solution is made by dissolving 20 grams of MnSO_{4} in 200 cubic centimeters of water and adding 40 cc.
manganous
sulphate
manganous