2006-11-14 19:47:47 · 15 answers · asked by bablu 1 in Science & Mathematics ➔ Chemistry
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-.
2006-11-14 20:21:08 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Value that denotes whether the solution is alkaline or acidic. If the pH is above 7, it means to say that the solution is basic; Below 7 means it is acidic. 7 is neutral.
2006-11-14 23:51:04 · answer #2 · answered by ? 7 · 0⤊ 0⤋
it's acidity level under 7 is acidic and over 7 is basic the scale goes up to 14. (ph level indicates the strength of acids and bases) 7 is neutral
2006-11-14 20:00:51 · answer #3 · answered by bring_it 1 · 0⤊ 0⤋
pH is negative logarithm of hydrogen ion activity in a solution.
For any electrolyte, the concentration of H+ ions x OH-ions concentration expressed in gram ion per litter is a constant (Dissociation constant), which is equal to 10 to the power -14
This gave rise to the pH scale.
2006-11-14 20:24:19 · answer #4 · answered by Agritalker 2 · 0⤊ 0⤋
ph value is the measure of acidity
ph -7 differentiate between alkali &acidic medium
2006-11-14 19:51:46 · answer #5 · answered by mukku 3 · 0⤊ 0⤋
It's a test of how basic/acidic a solution is
Ranges from 1-7
1 is super acidic
7 is very basic
6 is neural and tends to have properties like water. Water has a pH of around 6 and pure water hasa pH of 6
different ways to think about whether acid r base:
the H+ and OH- concentration
2006-11-14 19:50:45 · answer #6 · answered by xdannifenx 5 · 0⤊ 3⤋
it is the negative log (base 10) hydrozen ion concentration in moles per litres.If pH of a solution is less than 7 then it is acidic if 7 then neutral if more than it is basic in nature
2006-11-15 00:34:18 · answer #7 · answered by preety 2 · 0⤊ 0⤋
it is yhe test to no the acidic or basic behaviour of a thing. if pH is less than 7, then it is acidic. if it is 7, then , neutral & if it is more than 7 , then basic
2006-11-14 21:41:08 · answer #8 · answered by Isha J 2 · 0⤊ 0⤋
It is a scale from 1-14 that measures the degree of acidity or basicness of a substance. Water, for example, is a 7 because it is neutral.
2006-11-14 19:50:46 · answer #9 · answered by acage123 3 · 0⤊ 1⤋
pH value is variable for acid alkaline check various book
2006-11-14 20:16:56 · answer #10 · answered by Anonymous · 0⤊ 0⤋