How many coulombs of electricity is required to reduce 1 mole of Cr2O72- in acidic medium?

Question

How many coulombs of electricity is required to reduce 1 mole of Cr2O72- in acidic medium? (A) 4 × 96500 C (B) 6 × 96500 C (C) 2 × 96500 C (D) 1 × 96500 C

Tardigrade Admin · Accepted Answer

In acidic medium, dichromate ions are reduced according to the equation, Cr2O2-7+14H++6e- →2Cr3++7H2O 1 mole of Cr2O72- ion requires 6 moles of electrons or 6 × 96500 C of electricity.

Q. How many coulombs of electricity is required to reduce $1 m o l e$ of $C r_{2} O_{7}^{2 -}$ in acidic medium?

$4 \times 96500 C$

$6 \times 96500 C$

$2 \times 96500 C$

$1 \times 96500 C$

In acidic medium, dichromate ions are reduced according to the equation,
$C r_{2} O_{7}^{2 -} + 14 H^{+} + 6 e^{-} \to 2 C r^{3 +} + 7 H_{2} O$
$1 m o l e$ of $C r_{2} O_{7}^{2 -}$ ion requires $6 m o l es$ of electrons or $6 \times 96500 C$ of electricity.

Q. How many coulombs of electricity is required to reduce 1mole of Cr2​O72−​ in acidic medium?

4×96500C

6×96500C

2×96500C

1×96500C