Question

Write the net equations, the standard cell potential, and the number of electrons transferred in the following electrochemical cells.

Instructions:

Enter all substances in the order listed at the top of the column.

Use a carot to indicate a superscript, but do nothing for subscripts.

Use a hyphen + greater than (->) for yields.

Click on the eye symbol to check your formatting.

Pt/I₂,I^1-//Au³⁺/Au

Answer 1

Pt/I2,I-1 //Au+3/Au

according to the given galvanic cell representation

left side electrode acts as anode and right side electrode acts as cathode.

oxidation half reaction at anode             [ 2 I^1- -------------------- I2 + 2e-]x3

reduction half reaction at cathode       [ Au+3 +3 e- ----------------- Au]x2

                                                 -----------------------------------------------------------------

                                                       6 I^{1-   +} 2 Au⁺³   ------------------- 3 I2 + 2 Au

                                          ----------------------------------------------------------------------------

E0 of I2/I^1- = 0.535V                                      E0 of Au+3/Au = 1.50V

E0 cell = E0 cathode - E0 anode

E0cell = 1.50 - 0.535

E0cell = 0.965V

Totally 6 electrons are transferred .