Question

The no. Of moles of electrons req to reducr 0.2 mole of Cr2O7²- to Cr³+

Answer 1

Cr+6 to Cr3+ change is 3 moles of electrons

for 2 Cr 6 mole of charge.

1 mole required 6 mole of charge

0.2 required to reduce 1.2 mole of charge