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At 25°C the change in reduction potential of half cell is x when pH of solution changes from 1 to 6, keeping the concentration of all other chemical species as 1 M.

At 25°C the change in reduction potential of  half cell is x when pH of solution changes from 1 to 6, keeping the concentration of all other chemical species as 1 M.

Grade:12

1 Answers

Priyanshu Gujjar
101 Points
one month ago

Make sure you thoroughly understand the following essential ideas. It is especially important that you know the precise meanings of all the highlighted terms in the context of this topic.

  • The Nernst equation relates the effective concentrations (activities) of the components of a cell reaction to the standard cell potential. For a simple reduction of the form Mn+ + ne → M, it tells us that a half-cell potential will change by 59/n mV per 10-fold change in the activity of the ion.
  • Ionic concentrations can usually be used in place of activities when the total concentration of ions in the solution does not exceed about about 0.001M.
  • In those reactions in which H+ or OHions take part, the cell potential will also depend on the pH. Plots of E vs.pH showing the stability regions of related species are very useful means of summarizing the redox chemistry of an element.

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