A tablet weighing 0.940 g was dissolved in dilute sulphuric acid made up to 250 cm³…
CHEMISTRY · Subjective · AP · Chemistry · Chemical Reactions · Chemical Reactions
Problem
A tablet weighing 0.940 g was dissolved in dilute sulphuric acid made up to 250 cm³ with water. 25.0 cm³ of this solution was titrated with 0.00160 M K₂Cr₂O₇ requiring 32.5 cm³ of the K₂Cr₂O₇. Calculate the percentage by mass of Fe²⁺ in the tablet.