Question

${E^{0}}_{RP}$or Fe+/Fe and Sn+2/Sn are - 0.44 and 0.14 volts respectively. The standard emf for cell.

$Fe^{+ 2} + Sn\overset{\quad\quad}{\rightarrow}Sn^{+ 2} + Fe$is

• A.
  • 0.30 V
• B.
  • 0.58 V
• C.
  • 0.58 V
• D.
  • 0.30 V

Answer 1

Answer: (B)

• 0.58 V

Answer 2

$Fe^{+ 2} + Sn\overset{\quad\quad}{\rightarrow}Sn^{+ 2} + Fe$

${E^{0}}_{cell} = {E^{0}}_{Fe2 + /Fe} + {E^{0}}_{Sn/Sn^{+ 2}}$

= - 0.44 - 0.14 = - 0.58 V