Why we use activity rather than concentration in electrochemistry.

activity is ' effective concentration ' and can be used in non ideal conditions ( for concentrated solution) while concentration term is used in ideal solution ( diluted solution)....

Since the Van der Waals equation describes real gases instead of the ideal gases law, activity can be used in place of concentration to describe the behavior of real solutions vs. ...

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hope this will help you 🙏🙏

For the diluted solutions there is no problem, but once the solutions get more concentrated discrepancy between calculated and observed concentrations in equlibrium rises. That's w...