I did a lab where I titrated HCl with NH4OH and measured pH every 2 secs. This was done with 1M each, 1M HCl/2M NH4OH, and 2M HCl/1M NH4OH.
For determining the rate law/rate orders I know I can compare the ratio of reaction rates between trials to the ratio of concentration between trials (eg. if rate doubles as concentration of HCl doubles the reaction is first order with respect to HCl).
But I’m a little unclear on how to calculate rate of reaction from my pH data. Do I do change in [H+]/time for the time it takes to reach equilibrium? Or just for the initial spike? Or something else?
It may just be my data is not great and isn’t illustrating a clear rate order