pH of DISTILLED WATER ?
pH of DISTILLED WATER ?
(OP)
Why cannot the pH of distilled water be measured ?
And can the pH of Deionised water be measures?
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RE: pH of DISTILLED WATER ?
In fact the pH of both distilled and DI water can be measured, and in the case of freshly prepared water both should be in the vicinity of 7 pH, though the measurement sensitivity/accuracy will be somewhat dependent on the residual ion content and the condition of the pH meter. As both waters are exposed to the atmosphere, they will absorb carbon dioxide which gradually reduces the pH to a typical pH range of ~5+ to 6.5.
You might want to consider conductivity as a more reliable measure of distilled/DI water purity.
Orenda
RE: pH of DISTILLED WATER ?
I actually prefer to use resistivity rather than conductivity for highly demineralized water. Most people do not comprehend that a conductivity change from 0.055 uS/cm to 0.1 uS/cm is just as significant as a resistivity change from 18.2 M Ohm/cm to 10 M Ohm/cm.
RE: pH of DISTILLED WATER ?