Thank you robotman. I purchased a bottle of distilled water at the grocery store...it's funny that it is conductive. Where would you suggest I get it (we don't have the equipment to distill water at our school)?
We are having an issue with the conductivity testing. Distilled water is a conductor, so when the powders are dissolved in distilled water, they will all be conductors, right? Even sugar will conduct in distilled water. Are we doing something wrong? Does anyone have any advice on this?