Quote Originally Posted by Loris Medici View Post
Emil, how do you measure the solutions? (a.) Drop count (by pipette) or (b.) proper ml (by syringe)? If the former - (a.) that is... - mind that different solutions' specific gravity and surface tension are also different, therefore the drop volumes are different - hence the different rate of consumption... If the latter, I can't think of anything other than the phenomenon may be caused due to different vapor pressures (highly affects evaporation speed / rate) of the solutions. (But, most probably that can be omitted if you aren't using very large containers / small amounts of solutions and I highly suspect it would cause a significant difference...)

???

Regards,
Loris.
I use a small mesuring beaker/glass (I think it is the name).
So I could just be unprecise, but why be that on the same chemistry every time.....

I thank you for your ideas - it might make sense - I have to think that over..

Question: Am I the only one experiencing this?