The pH of a solution is a measure of its ratio of hydrogen atoms to hydroxide radicals, which are molecules composed of one oxygen and one hydrogen atom. If the ratio is one-to-one, the solution is neutral, and its pH is 7. A low-pH solution is acidic and a high-pH solution is basic. Ideally, distilled water is neutral, with a pH of 7.
The Process of Distillation
In order to distill water, you boil it and direct the steam into a condensing coil, where it cools and returns to the liquid state. In the process, all salts and particulate matter are left behind, and the fluid collected is, in most cases, nothing but pure water. Distillation doesn't remove some solutes that evaporate along with water -- such as alcohol. If these are present, other refinement methods may be needed to purify the water.
Distilled Water Absorbs Carbon Dioxide
The pH of pure, distilled water in a vacuum is 7; it is neither acidic nor alkaline. Immediately after distillation, however, water begins absorbing carbon dioxide from the atmosphere, and it forms carbonic acid -- a weak acid. This absorption continues until the carbon dioxide concentration in the water is the same as it is in the atmosphere. At this point, the pH of the distilled water is around 5.8.
- Photo Credit sugar0607/iStock/Getty Images
Alkaline Water Health Benefits
Is it a super health product or just a scam? Advocates of high alkaline water say drinking it can help your body...
What Is the pH of D.I. water?
D.I. water is deionized water, or demineralized water. It is essentially water without the minerals, or as close to no minerals as...
Is Distilled Water Acidic or Alkaline?
Distilled water is the most chemically pure form of water, as well as being safe to drink. Made of mostly whole water...
How to Raise the PH Level in Water
The pH level in water can be raised or lowered easily to make it more compatible for any application. Pure water, or...
What Is the pH of Distilled Water?
By definition, water has a pH of seven because it has an equal concentration of hydrogen ions, and so the pH of...