Question

1) To determine the total acidity of gastric juice, 5 ml of juice was titrated with an alkali solution with a
concentration of 0.095 mol/l in the presence of phenolphthalein. 2.5 ml of the alkali solution was used
for the reaction. Calculate the acidity of the analyzed juice in mol/l.
2)
Calculate the weight of the KMPO4 sample required for the preparation of: a) 1 liter of KMnO4 solution
with a molar concentration equivalent to 0.1 mol/l, b) 0.5 liters of KMPO4 solution with a molar
concentration equivalent to 0.05 mol/l for permanganatometric titration. M(KMnO4)=64+39+55=158
m(x)= ( C(1/2 x)*M(x)*V)/ z
3)
To calculate molar concentration, molar concentration of equivalent titer of H2SO4 by mass fraction
(30%) and density (1.22 g/cm8).​