Quantity of electricity required to reduced 0.1 mole of Cr2O7- 2 to Cr+ 3 completely is:-

Question

Quantity of electricity required to reduced 0.1 mole of Cr2O7- 2 to Cr+ 3 completely is:- (A) 9650 C (B) 96500 C (C) 57900 C (D) 54900 C

Tardigrade Admin · Accepted Answer

1 mole of Cr 2 O 7-2 required 6 moles of electrons ∴ 0.1 mole Cr 2 O 7-2 will required 0.6 moles of electrons 0.6 mole e -=0.6 × 96500= 57900 C Charge

Q. Quantity of electricity required to reduced $0.1$ mole of $C r_{2} O_{7}^{- 2}$ to $C r^{+ 3}$ completely is:-

$9650 C$

$96500 C$

$57900 C$

$54900 C$

$1$ mole of $C r_{2} O_{7}^{- 2}$ required $6$ moles of electrons
$∴ 0.1$ mole $C r_{2} O_{7}^{- 2}$ will required $0.6$ moles of electrons
$0.6$ mole $e^{-} = 0.6 \times 96500 = 57900 C$ Charge

Q. Quantity of electricity required to reduced 0.1 mole of Cr2​O7−2​ to Cr+3 completely is:-

9650C

96500C

57900C

54900C