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It almost never is. BUT
(pH stands for potential hydrogen)
pH is a (negative of) the log of the number of positive ions in the water.
At 25 degrees C, thermal agitation in pure water will produce 10 to the minus 7 (moles of) ions per liter,
thus pH 7 (at 37 degrees it's 7.4)
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoThat is a mathematical consequence of the dissociation of water into H30+ and OH- ions, which is a concentration of approx 1 times 10 to the power of -7 of each ion in pure water.
Wiki User
∙ 14y agoBecause it is. Some things "just are". This is one of them. The dissociation constant of water at 24oC just happens to be 1x10-14, so the pH is 7.
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What is the pH level for deer park bottled water?
Ultrapure water has the pH=7; bottled water is not pure, so the pH is variable depending to the type of water.
Pure water has a pH of 7?
Yes and no. Pure water at 25°C has a pH of 7.0. However, water autoionises, that is splits into H+ (in the form of H3O+) and OH- spontaneously. This process is accelerate by increased temperature, that is, occurs more readily at higher temperature. Therefore at a higher temperature there will me more H+ and OH- in solution (always in equal proportions). As pH is a measure of the amount of H+ in solution, as the temperature increases, the pH will lower (lower pH means more H+). i.e. at 37°C the pH of pure water, the same water as above, will be 6.81. This water will not be acidic though, as the OH- concentration has increased by the same amount, it's just that pH only measures the pH concentration. Conversely, cool the water, and the pH will go up, 7+ for same reasons.
PH of pure water?
Water is never by itself in the human body, blood, which is obviously mostly water, has a pH of 7.4, slightly basic. Lymph, even more water than blood, is a little higher at 7.5
What is the pH level of Kroger purifed water?
Purified water should have a pH level of 7. The values of 7 is neutral on the pH scale.
Definition of neutral chemical?
The definition of a neutral chemical is an aqueous solution with a pH of 7.0 ([H+] = 1.0 x 10-7 M)
What pH is pure water?
pure water is neutral with a pH of 7
A sample of a substance with pH 7?
Pure water has a pH of about 7.
What subtance has a pH of 7?
Pure water has a pH of 7.0.
What is the pH of cold water?
If the water is pure, the pH of that is 7, neutral yeah.
Pure water has a pH level of?
Pure water has a neutral pH value of 7, anything above 7 is alkaline and anything below 7 is acidic.
. Which substance would have a pH close to 7?
The pH of pure water is 7
What is is a substance with a pH of 7?
pure water
What Substance has pH 7?
Pure Water
What is the pH of chemically pure water?
7
What is the PH level of pure water?
7
What is pure water in the pH scale?
7
Pure liquid water has a pH of what?
7
