effectivedragon

In recent days I have done a few experiments measuring the current of water as it goes up from 9 volts up to 36 volts, and following Ohms law to convert it to resistance. And I discovered a very interesting trend. In between 9 and 18 volts, there is a massive drop in resistance (by around a 40% reduction) but then as I go up to 27 volts, its a 5% reduction, and is even less of a reduction when reaching 36 volts. I've done this experiment a few times and this has continued to happen. This is it visualised on a graph; I am curious to know why this happens, why there seems to be a reduction as I go from 9 to 18 volts, yet the reduction seems to reduce at 27 volts and reduce further at 36. Is there a reason that? And as I go further up the voltages (don't want to test with higher), does this continue with the reduction in resistance continuously reducing, and if not at what voltage does it change? Specifically am asking why this is happening and what happens when the voltage gets higher. I kinda want to know what resistance can I expect at around 240 volts In the following video, a YouTuber does this experiment through a plastic pipe and tested AC through water (and also did DC in another video) and the results other than the early voltages (which lends credence to my theory about it being calculations) is quite linear and approximately ohmic. I did calculations based on his readings and got these results. Does this mean water is mostly ohmic whenever a current goes through it and if the probes were close together would it be the same level of ohmicness? How much does the electrochemistry reduce the resistance?