x moles of potassium dichromate oxidises 1 mole of ferrous oxalate, in acidic medium. Here x is

Question

x moles of potassium dichromate oxidises 1 mole of ferrous oxalate, in acidic medium. Here x is (A) 3 (B) 1.5 (C) 0.5 (D) 1.0

Tardigrade Admin · Accepted Answer

The reaction of oxidation of ferrous oxalate by potassium dichromate in acidic medium is written as

2 F e C_{2} O_{4} + C r_{2} O_{7}^{2 -} + 14 H^{+} ⟶ 2 F e^{3 +} + 2 C r^{3 +} + 4 C O_{2} + 7 H_{2} O

∵ 2

moles of

F e C_{2} O_{4}

are oxidised by

= 1

mole of

C r_{2} O_{7}^{2 -}

∴ 1

mole of

F e C_{2} O_{4}

will be oxidised by

= \frac{1}{2} = 0.5

mole of

C r_{2} O_{7}^{2 -}

Q. x moles of potassium dichromate oxidises 1 mole of ferrous oxalate, in acidic medium. Here x is