Class 11 Chemistry Redox Reactions | Electrochemical series |

**Electrochemical series**

Is the arrangement of elements in order of increasing potential. It is the series has the values starting from –ve to positive. The series is shown below:

**Application:**

- The series tells us about the strength of reducing or oxidizing agents

“Lower the value of potential, stronger is the reducing agent “or vice versa.

- The series tells us how to calculate standard electrode potential for cell that is :

E* = (E_{c} - E_{a})

- The series helps us to predict the feasibility of reaction.

- ‘If value of E* is positive , then the reaction is feasible
- If not positive, than the given reaction is not feasible “

- The series helps us to know which metal will evolve hydrogen gas and which will not.

“All the metals with negative reduction potential will evolve hydrogen and others do not.”

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