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Date May 2015 Marks available 1 Reference code 15M.1.hl.TZ1.33
Level HL Paper 1 Time zone TZ1
Command term Question number 33 Adapted from N/A

Question

Consider the standard electrode potentials:

\[{\text{F}}{{\text{e}}^{{\text{2 + }}}}{\text{(aq)}} + {\text{2}}{{\text{e}}^ - } \rightleftharpoons {\text{Fe(s)     }}  {E^\Theta } =  - {\text{0.45 V}}\]

\[\frac{1}{2}{\text{C}}{{\text{l}}_{\text{2}}}{\text{(g)}} + {{\text{e}}^ - } \rightleftharpoons {\text{C}}{{\text{l}}^ - }{\text{(aq)     }}  {E^\Theta } = {\text{ }} + {\text{1.36 V}}\]

What is the standard cell potential, in V, for the reaction?

\[{\text{C}}{{\text{l}}_{\text{2}}}{\text{(g)}} + {\text{Fe(s)}} \to {\text{2C}}{{\text{l}}^ - }{\text{(aq)}} + {\text{F}}{{\text{e}}^{2 + }}{\text{(aq)}}\]

A.     \( + {\text{0.91}}\)

B.     \( + {\text{1.81}}\)

C.     \( + {\text{2.27}}\)

D.     \( + {\text{3.17}}\)

Markscheme

B

Examiners report

[N/A]

Syllabus sections

Additional higher level (AHL) » Topic 19: Redox processes » 19.1 Electrochemical cells
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