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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?

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    $\begingroup$ Welcome to Chemistry.SE. Could you provide more information about the "several sources" you mention? Links would great if possible. I have also edited your question to make the chemical formula of sulfuric acid look like $\ce{H2SO4}$. You can learn how to do this for yourself from the faq. $\endgroup$ – Ben Norris Jul 6 '13 at 21:39
  • $\begingroup$ Give all details of your set-up including electrode and the ohmmeter. Did you check for an breaks in the wiring? $\endgroup$ – user2617804 May 20 '14 at 10:35

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