Fluorine cannot be prepared from fluorides by chemical oxidation.

 


Fluorine is the strongest oxidizing agent as it has highest E0 value. Therefore fluorine has the highest tendency to get reduced to F-. As a result, F- ion has the least tendency to get oxidized, hence fluorine cannot be prepared by chemical oxidation of fluorides.

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What is the effect of decreasing concentration on the molar conductivity of weak electrolyte?

Weak electrolytes: When the concentration of weak electrolyte becomes very low, its degree of ionisation rises sharply. There is sharp increase in the number of ions in the solution. Hence, the molar conductivity of a weak electrolyte rises steeply at low concentration.

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How does free energy change related to emf of cell?

Gibbs Free Energy is defined as the thermodynamic potential that signifies the maximum or reversible work performed by a thermodynamic system at constant temperature and pressure. i.e.

rG° =-nFEcell0alsorG°=-RT In kthus -RT In k =-nFEcell0Ecell0 =RTnFIn K

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How can the standard oxidation potential of an electrode be raised up?


Standard Oxidation Potentials. The standard oxidation potential is much like the standard reduction potential. It is the tendency for a species to be oxidized at standard conditions.
it can be raised up by reducing hydrogen value in cell reaction.

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Which factor makes secondary cells more acceptable as a source of power?

Secondary batteries are the rechargeable batteries. They have the advantage of being more cost-efficient over the long term, although individual batteries are more expensive. Generally, secondary batteries have a lower capacity and initial voltage, a flat discharge curve, higher self discharge rates and varying recharge life ratings.

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