can you tell me the answer to this. explain the concept of PH?

Answer 1

pH stands for the negative log of the Hydrogen ion concentration.
It ranges from 1 to 14.
1 is the most acid, 7 is neutral, 14 is the most alkaline (basic)

Answer 2

Potential of Hydrogen (pH) is a scale of acidity or alkanilinty.

Here are a few of the basics:

The concept of pH was first introduced by Danish chemist S. P. L. Sørensen in 1909.

The scale runs form 1 (very strong acid) to 14 (very alkaline)

Lower pH solutions have a higher hydronium (H3O) ion content. Hydronium is a positive ion.

OH is a negative ion. A higher concentration of OH represents higher alkalinity, and a hiugher number on the pH scale.

At 25 degrees Celsius, a pH fo 7 is neutral because it represents "pure water" (H3O plus OH equals two H2O molecules), which is neither acidic nor alkaline ("basic").

Lower pH represents a stronger acidity and a higher pH represents more alkalinity.

The scale is a "reverse logarithmic representaion of relative Hydrogen proton concentration"

"Unlike linear scales that progress in a smooth, incremental manner, a shift in value on the pH scale represents a tenfold difference in H+ concentration. For example, a shift in pH from 2 to 3 represents a 10-fold decrease in H+ concentration, and a shift from 2 to 4 represents a one-hundred (10 × 10)-fold decrease in H+ concentration."

This is over-simplifying the matter, but it is a start. I recommend visiting http://en.wikipedia.org/wiki/PH
http://web.jjay.cuny.edu/~acarpi/NSC/7-ph.htm
http://www.purchon.com/chemistry/ph.htm

These sources can give you a much more in depth explanation.

Answer 3

pH is a measure of the acidity or alkalinity of a solution. The letters "pH" stand for Potential of Hydrogen. Aqueous solutions at 25 ℃ with a pH less than seven are considered acidic, while those with a pH greater than seven are considered basic (alkaline). The pH of 7.0 is considered neutral.

In simpler terms, the number arises from a measure of the activity of hydrogen ions in the solution. The pH scale is a reverse logarithmic representation of relative hydrogen proton (H+) concentration. Unlike linear scales that progress in a smooth, incremental manner, a shift in value on the pH scale represents a tenfold difference in H+ concentration. For example, a shift in pH from 2 to 3 represents a 10-fold decrease in H+ concentration, and a shift from 2 to 4 represents a one-hundred (10 × 10)-fold decrease in H+ concentration.

Answer 4

'pH' is a measure of the acidity of a substance.
It ranges from 0 - 14, most acid to most alkaline.
A definition of 'pH' is " The negative logarithm to the base 10 of the hydrogen ion concentration".
Because the hydrogen ion concentration can range from 1, all the ions in a solution are hydrogen ions (H+) to 0.00000000000001, virtually no hydrogen ions.
Note that 1 is 10^0 and 0.00000000000001 is 10^-14, and it is the power of 10 (0 to -14) that represents the numerical value of pH.

Answer 5

It is a number from 0 to 14, which chemists use to indicate if a liquid has acid or basic character.

pH 7 is neutral, like pure water. Neither acidic nor basic.

pH less than 7 is acid.
Example; HCL solution may have pH 1.2. Na2CO3 solution may have pH 8. Coca-Cola may have pH 2.5

pH more than 7 is basic.
Na2CO3 solution may have pH 8. Solution of NaOH may have pH 12.
Soap solution will also have basic properties, because it has pH more than 7

pH is the negative logarithim of the hydrogen ion concentration.

Answer 6

Water isn't just pure H2O

When you have a bunch of it, ions are formed.

H3O+ and OH-

The more H3O+ ions you have, the lower the pH

The more OH- ions you have, the higher the pH

The scale is 0-14.

Below 7.00 is considered acid

Above 7.00 is considered basic

Also: It's on a log scale. That means that if something has a pH of 9.00, then it has 10 times as many OH- ions as something that has a pH of 8.00. If it has a pH of 12.00, then it has 100 times as many OH- ions as something that has a pH of 10.00.