Use the standard electrode potential for A, B, C, D and F given below to answer the

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Question:

Use the standard electrode potential for A, B, C, D and F given below to answer the questions that follows. The letters do not represent the actual symbols of the elements

E^Q volts

A (aq)²⁺ + 2e → A(s) - 2.90V

B (aq) ²⁺ 2e →B(s) - 2.38V

C (aq)⁺ + e→ ½ C₂ - 0.00V

D (aq) ⁺² + 2e → D(s) + 0.34V

½ Fe₂ + e → F (aq) + 2.87V

(i) Which element is likely to be hydrogen? Give a reason for your answer

(2mks)

(ii) What is E^Q value for the strongest reducing agent? (1 mk)

(iii) In the space provide, draw a labeled diagram of the electrochemical cell that would be obtained when a half cells of element “B” and “D are combined (3mks)

(iv) Calculate the EQ value of the electrochemical cell constructed in (iii) above