What is pH?

Answer 1

pH is a measure of the acidity of a solution in terms of activity of hydrogen (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. 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.

Answer 2

pH is the -log of the H+ ion concentration in a solution. The higher the H+ ion concentration, the lower the pH would be and the more acidic the solution is. Although pH of solutions usually range between 0 and 14, it is possible to have something below 0 or above 15.

Answer 3

pH stands for the 'power of Hydrogen' - basically, its a measure of the concentration of hydrogen ions (and thus acidity) in a solution. It is measured using a logarithmic scale from:
1 (acidic) through 7 (neutral) to 14 (basic/ alkaline), hence the reason for the calculation pH = -log[H+], that was mentioned above. The fact that it is a logarithmic scale means that a dencrease by 1 on the pH scale corresponds to a tenfold increase in the concentration hydrogen ions e.g. a solution with pH1 is 10 times stronger than a solution of pH2, and 100 times stronger than a solution of pH3.

Answer 4

pH is a measure of the acidity of a solution in terms of activity of hydrogen (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 [1] [2]).

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. [4] [5] [6] In English, pH can stand for "hydrogen power,"[4] [5] [6] "power of hydrogen," [7] [8] or "potential of hydrogen."[3] [9] [10] All of these terms are technically correct.

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Answer 5

PH is a ratio,it measure acidity and alkaline.
It runs from 1 to 15 and a material is neutral at 7 or 8.

Answer 6

pH is the level of acidity in a substance. It is based on a scale of 1 to 14, with 14 being very acidic.

Answer 7

pH (if you're talking science) is the amount of acidity. The ph scale measures acidity.

Answer 8

pH is something that is used to decide whether a soln is acid or base..........1 to6 acidic, 7 neutral, 8 to 14 alkaline

Answer 9

pH
Horiba Instruments provide a wide range of water quality measurement devices, including IT, medicine, environmental monitoring and analysis, biotechnical and power utilities.

Answer 10

it refers to the acidity level of a certain substance