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Secondary Cells

Electrode pot...

Question

Electrode potential data of few cells is given below. Based on the data, arrange the ions in increasing order of their reducing power :- Fe3+(aq) + e– → Fe2+(aq); E° = +0.77 V Al3+(aq) + 3e– → Al(s); E° = –1.66 V Br2(aq) + 2e– → 2Br–(aq); E° = +1.09 V (1) Br– < Fe2+ < Al (2) Fe2+ < Al < Br– (3) Al < Br– < Fe2+ (4) Al < Fe2+ < Br–

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Q. Which of the following statement(s) is/are correct regarding the given electrode potential data?

F e^{3 +} (a q) + e^{-} \to F e^{2 +} (a q); E^{0} = + 0.77 V

A l^{3 +} (a q) + 3 e^{-} \to A l (s); E^{0} = - 1.66 V

B r_{2} (g) + 2 e^{-} \to 2 B r^{-} (a q); E^{0} = + 1.08 V

Q. Electrode potential data are given

F e_{(a q)}^{3 +} + e^{-} \to F e_{(a q)}^{2 +}

E^{o} = + 0.77

V

A l_{(a q)}^{3 +} + 3 e^{-} \to A l_{s}; E^{o} = - 1.66

V

B r_{2 (a q)} + 2 e^{-} \to 2 B r_{(a q)}^{-}; E^{o} = + 1.66

V
Based on the given data which statement(s) is/are incorrect?

F e^{3 +} (a q) + e^{-} \to F e^{2 +} (a q); E^{\circ} = + 0.77 V

A l^{3 +} (a q) + 3 e^{-} \to A l (s); E^{\circ} = - 1.66 V

B r_{2} (a q) + 2 e^{-} \to 2 B r^{-}; E^{\circ} = + 1.09 V

Considering the electrode potentials, which of the following represents the correct order of reducing power?

F e^{2 +} (a q) + 2 e^{-} \to F e (s)

E^{⊖} = - 0.44 V

A l^{3 +} + 3 e^{-} \to A l (s)

E^{⊖} = - 1.66 V

B r^{2 +} 2 e^{-} \to 2 B r^{⊖} (a q)

E^{⊖} = - 1.08 V

The decreasing order of reducing power is:

Q. Based on the date given below, the correct order of reducing power is:

F e^{3 +} (a q) + e \to F e^{2 +} (a q); E^{o} = + 0.77 V

A l^{3 +} (a q) + 3 e \to A l (s); E^{o} = - 1.66 V

B r_{2} (a q) + 2 e \to 2 B^{-} (a q); E^{o} = + 1.08 V

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