What Is The Ph Level Of Distilled Water

The ph of drinking water.

In practice it s difficult to put an exact number on the ph of distilled water because simple exposure to air can dissolve carbon dioxide. However over time the ph level decreases. The ph value of unadulterated distilled water is considered as 7. The ph of distilled water is theoretically about 7.

Distilled reverse osmosis water. Didn t read the ph of distilled water immediately after distillation is 7 but within hours after distillation it has absorbed carbon dioxide from the atmosphere and become acidic with a ph of 5 8. When distilled water sits for about two hours it absorbs more carbon dioxide in the air making it acidic. Distilled water is often exposed to carbon dioxide in the air at some point during the distilling process.

If it has been left open to the air the ph can even fall just below 5 5. The distilled water ph level is 5 6 and 7. Although the ph of pure water is 7 drinking water and natural water exhibits a ph range because it contains dissolved minerals and gases. Depending on how long it has been exposed to air the ph reading of distilled water can range anywhere between 5 5 and 6 9.

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Distilled water tends to test between 7 0 and 6 8 on the ph scale because water exposed to the open air absorbs carbon dioxide and becomes more acidic. According to experts distilled water is closest thing to neutral ph water people can get and it is perfectly harmless to drink. Pure water is 7 0 and completely neutral but distilled water sources can get as low as 5 5. Why does the ph of a substance matter.

This happens because distilled water has had all of its salts removed during distillation meaning that it has a very poor buffering capacity. However instantaneously after distillation the distilled water becomes an active absorber and as soon as it is exposed to air it starts absorbing carbon dioxide from the air and creates carbonic acid. Bottled waters labeled as alkaline. Pure water has ph 7 so still freshly distilled water should have a ph of 7 0.

Surface waters typically range from ph 6 5 to 8 5 while groundwater ranges from ph 6 to 8 5.