# Chapter 9 - Page 3 - Figure 3

## Estimation of ka

Wagner-Nelson Method

Try out the calculator by pressing Random Data or entering your own data. Plot the data on the semi-log plot. Press Calculate and select or deselect data to get a good value for the terminal slope, kel, using the graph and R^{2} value. Calculate A/V and Plot. Select and deselect values to get a good plot and Calculate for a good value for R^{2}.

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