The p stands for "power". The H stands for hydrogen, as is common in chemistry; in this case, it specifically means the hydrogen ion H+, which in water actually exists as H.x(H2O)+, where x is generally 1 to 3 or so.
You will occasionally see the "p" notation in other things, and it generally means "the negative log to the base 10 of" whatever follows it. For example, pKa means the negative log to the base 10 of the acid dissociation constant.
Pure water has a pH of 7, which is considered neutral on the pH scale.
No, acids have a smaller pH than water. It is usually <6 and pure water has a pH of 7.
yes, pH can be measured in a water (an aqueous) solution.
Adding water will affect the pH. Adding water will shift the pH towards the neutral mark. In the case of an alkaline solution, there will be a decrease in pH.
Salts that are insoluble in water typically do not affect the pH of the solution. This is because they do not dissociate into ions in water to contribute to the H+ or OH- ions that determine pH. If there are impurities or other substances present that can dissolve and affect pH, then the pH may change.
Circulating water in a standing water ecosystem can affect the ecosystem. This is because it can change the PH of the water killing the existing organisms.
Purple Heart
Increase pH (water) = 7 pH (KOH solution) is about 8 - 10
Pure water has a pH of 7, which is considered neutral on the pH scale.
low water and low ph
The abbreviation "pH" stands for "potential of hydrogen" in text.
Pinch Hitter
Hydrogen
The pH of water is 7 http://en.wikipedia.org/wiki/File:PH_scale.png
No, acids have a smaller pH than water. It is usually <6 and pure water has a pH of 7.
yes, pH can be measured in a water (an aqueous) solution.
the normal pH of rain water is about 5.6