V. The flask contained brown oxide 150 m.g. potassium permanganate 20
c.c. = 112.48 m.g. N/10 nitric acid 6.98 c.c. (= 2 molecules for each
molecule of KMnO₄) and was heated for three hours in the water-bath.
Acid neutralized = 0.35 c.c. = 5.0 percent.