Answer to Question #224411 in Physical Chemistry for Jojo

Question

An iron weighs 2.225g. It’s dissolved in an acid which oxidizes to Fe²⁺ and made up of 250cm^3. A 25cm³ of sample required is 31cm³ of a 0.0185mol L^-1 solution of potassium dichromate in a titration.

Calculate the number of moles of potassium dichromate used in the titration?

Answer 1

Molar Mass of iron = 55.485

Molar Mass of potassium dichromate =294.185

= 18.5 × 31 = 573.5

= 573.5/294.185

= 1.95moles