On the Accuracy of Volhard Method for the Determination of Manganese

the Accuracy of Volhard Method for the Determination of Manganese Critical study was nlade on the causes of errors in determining manganese ill steel after Volhard method Solid zinc oxide have a tedellcy to adsorb manganese ion Therefore a large excess of it should be avoided in zinc oxide separation potassium permanganate was stable in boiling hot solution at pH 708 which was obtained by saturation with zinc oxide Fading in pink of potassium permanganate observed near the end point of the titration is attributed therefore to the consumption of it by man-