At what [OH−] does the following half-reaction have a potential of 0V when other species are at 1M? NO−3+H2O+2e−→NO−2+2OH−,E∘cell=0.01V.
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Q2
At what concentration of [OH−] does the following half reaction has a potential of 0V when other species are at 1M? NO−3+H2O+2e−→NO−2+2OH−;E0cell=−0.06V
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Q3
The standard oxidation potential for the half cell NO−2(g)+H2O→NO−3(aq)+2H+(aq)+2e− is –0.78V.
Calculate the reduction potential in 9 molar H+ assuming all other species at unit concentration. What will be the reduction potential in neutral medium?
(Given, log9=0.95
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Q4
The standard reduction potential for the half-cell having reaction, NO−3(aq.)+2H+(aq.)+e−→NO2(g)+H2O is 0.78volt. (i) Calculate the reduction potential in 8MH+. (ii) What will be the reduction potential of the half-cell in a neutral solution? Assume all other species to be at unit concentration.
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Q5
The standard reduction potential at 25oC of the reaction H2O+2e−→H2+2OH− is − 0.8277V. Calculate the equilibrium constant for the reaction 2H2O→H3O++OH− at 25oC.