Question

15. Based on the table of standard reduction potentials in your OpenStax textbook (table 16.1), what would be an appropriate cathode if solid silver was used as the anode? Calculate Eºcell for your chosen cathode. (6 pts) 16. A+B+C+D Imagine that you are performing kinetics studies on the above reaction. You vary the concentration of reagent A over multiple trials but find that it does not affect the time for the reaction to be completed. What does this tell you about the order of reactant A? (4 pts)

both questions please! :)

Answer 1

Answers:

15. If silver is used as the anode or oxidising electrode, then the cathode or reducing electrode should be a metal having higher reduction potential than silver. Hence, gold will be the suitable cathode as the standard reduction potential of gold is +1.83 V and that of silver is +0.8 V.

So, E^o_cell = E^o_{reduction,cathode} - E^o_{reduction, anode}​ = 1.83 - 0.8 = 1.03 V

16. If on varying the concentration of A over multiple trials the time taken for completion of reaction doesn't vary, it means that the reactant A has no effect on the rate of the reaction. In that case, order of reaction with respect to A must be zero or much much less than order of B.