Answered: Why can one not make F2 the same way as…

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 160MP

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1. Why can one not make F₂ the same way as Cl₂, by electrolysis of a solution of KF in water? Mark the following statements (A-D) as true or false

A) Because F2 is too soluble in water T/F

B) Because the standard reduction potential of F2 is much more positive than the standard reduction potential of O2 T/F

C) Because at the anode, oxygen evolution takes place preferentially over fluorine evolution T/F

D) The high reactivity of fluorine is in part due to the low bond dissociation energy of the F2 molecule T/F

Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.

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