Is distilled water acidic?
A-Because distilled water is so pure, if not stored in an airtight container, it is possible over time to absorb a very low amount of CO2, (carbon dioxide), from the surrounding air. This may cause the results of a ph test to appear acidic. But the reason for this is that because everything, (either alkaline and acidic) has been eliminated from the water, only a very minuscule amount of any acidic substance, (from the surrounding air for example), will cause a ph scale reading to appear acidic. (A ph scale does not measure how much acid is in water, as it only measures the relative amount of acid vs. alkali.) It is very difficult if not impossible to quantify how much actual acid is contained in distilled water because of this, but it is very safe to say that it is a very, very low amount. So even though a ph reading of distilled water may appear to be a little on the acidic side, the actual amount of acidic substances in distilled water is far less than what is contained in a regular
