I diluted sulfuric acid in deionized water in order to get a 10% $\ce{H2SO4}$ solution.
I was going to use this solution as a cathode of a porous sample to measure its electrical properties.
However, this solution has a quite high resistivity (~200 ohm.cm DC).
I checked several sources that tell me that I should be measuring a lower resistance.
Does anyone has an idea of what may be happening?