9) Th e potential of a reduction half-reaction in which all reactants and produc

Question

9) Th e potential of a reduction half-reaction in which all reactants and products are in their standard states at 25 'C is known as the: a) Potential energy ) Standard hydrogen electrode c) Standard reduction potential Standard free energy change 10) If E. for the reaction in question #2 (for the reaction as written) is 0.447 V, and E"for the reaction in question #3 (forthereactionas written) is 1.358 V, what is E"m for the reaction in question #47 11) What is the difference (for any electrochemical cell) between E cell and Ecen? 12) Electromotive force is also calledem 13) What is a voltaic cell? 14) what is the value for G° for the reaction in question #47

Explanation / Answer

9.

(c) Standard reduction potential

10.

E0cell = E0red - E0oxi = 1.358 - 0.447 = 0.911 V

11.

E0cell is measured at standard conditions i.e. at 298 K and 1 bar and 1 M of electrolytic solutions.

Ecell is measured at any other temperature, pressure and concentration of ions.

12.

Electro motive force is also called as emf or cell potential

13.

Voltaic cell is a cell which converts chemical energy released in spontaneous redox reaction into electrical energy.

14.

deltaG0 = - n F E0cell

knowing n value we can get deltaG0

n = number of electrons transferred in ov

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