Hello,

I have been following the Drift method for my chars (0,1M NaCl solution and pH adjusted with 0,01-0,1M NaOH/HCl) by adding 50mg char in 50mL of a 0,1M NaCl solution pH adjusted.

One of my main problem is that the pH final is always above (except for 11,03 where the pH final was 11) the initial pH. I have been doing th range of 2,5 - 11,3 and I can't find a really big tipping point. What am I doing wrong? Is it my NaCl solution that is too concentrated?

Thanks !

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