What is the pH of pure water? pH of the human body?

pH of water is 7. Normal pH of human blood is 7.35 - 7.45.

Water is pH7. "Neutral". A pH of 0 would mean it's highly acidic. *rolls eyes*

if water had a pH of 0 we would all be dead!!!! The pH of water is generally 7, give or take +/- 0.5. The pH of the human body depends on what you're talking about. Urine can have quite different pH values depending on what is being disposed of. Blood is slightly alkaline at a pH of around 7.4. So generally, for your body to act normally, the ideal pH would be in the 7 region or slightly higher, seeing as 7 is neutral.

pH of pure water should be 7,0 (neutral, neither acidic nor alcaline) in theory, but I have noticed in lab that when you measure the pH of distilled water it is always acidic (pH 4-5), I think this is because it gets acidified by C02 from the air (which forms carbonic acid in the water. In the body the pH is different in different compartments, e.g. in the stomach it is very acidic, in other compartments is is near to neutral but I am not sure of the exact values.

pH is a measure of the acidity of a solution, in terms of activity of hydrogen ions (H+). For dilute solutions, however, it is convenient to substitute the activity of the hydrogen ions with the molarity (mol/L) of the hydrogen ions (however, this is not necessarily accurate at higher concentrations. In aqueous systems, the hydrogen ion activity is dictated by the dissociation constant of water (Kw = 1.011 × 10−14 M2 at 25 °C) and interactions with other ions in solution. Due to this dissociation constant, a neutral solution (hydrogen ion activity equals hydroxide ion activity) has a pH of approximately 7. Aqueous solutions with pH values lower than 7 are considered acidic, while pH values higher than 7 are considered basic. The concept was introduced by S.P.L. Sørensen in 1909, and is purported to mean "pondus hydrogenii" in Latin.[3] However, most other sources attribute the name to the French term pouvoir hydrogène. In English, pH can stand for "hydrogen power, "power of hydrogen," or "potential of hydrogen."All of these terms are technically correct. The precise formula for calculating pH is: pH=-log10(aH+) pH Balance in the Human Body : Different fluids in the human body generally have a delicate range of acid-alkaline balance they maintain for optimal functioning. Human blood has a normal pH of about 7.41. The pH of urine has a wider range. Normal ranges for urine pH are from 4.5 to 8. Urine pH tends to have wider variations based on the acid or alkaline forming potential of foods eaten during the course of the day. First morning urine before any foods are eaten is often considered the most accurate indicator of true urine pH because it is not influenced by the acid or alkaline forming potential of recent meals or snacks. When the pH levels of blood or other key bodily fluids fall out of optimal pH range due to adverse metabolic or respiratory conditions, the human body goes through a variety of adjustments to try to correct the acid or alkaline imbalance. If the body is too alkaline, a condition called alkalosis results. Conversely, an overly acid condition results in acidosis. Checking urine pH is one way doctors look for imbalances in the pH levels of the body. Testing blood pH levels is another option. Holistic doctors often recommend self testing your urine pH or saliva to determine the pH levels and then adjusting your diet accordingly to try to balance your overall body pH. That is, if your urine is too alkaline to eat a more acid forming diet, or if it is too acid to eat a more alkaline forming diet. Conventional medical doctors are often skeptical at the idea that diet can influence anything but your urine pH levels and that diet has no impact on stomach acid or blood pH. This view is no longer as wide spread as it once was, and in recent years it has been suggested by some researchers that a low grade acidosis among the general population of industrialized countries caused by cereal grains and other refined foods common in modern diets may be partly responsible for many of our modern diseases. aH+ denotes the activity of H+ ions, and is unitless. In dilute solutions (such as tap water), the activity is approximately equal to the numeric value of the concentration of the H+ ion, denoted as [H+] (or more accurately written, [H3O+]), measured in moles per litre (also known as molarity).

It is 0.

Pure water is 7. The pH of human blood is around 7.4. The pH in your stomach is slightly more acidic.

Distilled water, if memory serves, is neutral at 7.0. The human body is slightly alkaline at 7.43 or so.

of water its 0