The pH scale is used to mesure the level of acidity in a liquid but what does pH stand for?
401913
pH was originally written by Dr Sørensen as PH, and it stands for pondus hydrogenii which means "potential hydrogen". The terminology refers to acidity being due to a predominance of hydrogen ions in an aqueous (water containing) solution.
759411
Acidic.  Citric acid.
91904
That depends on the type of pH stripe. They come with a color scale so you can compare the color with the standards.
184683
pH is the measure of acidity or basicity(alkalinity) of a solution. When pH increases, the solution is more alkaline and when pH decreases the solution is more acidic. A pH of 7 implies that the solution is neither basic(alkaline) nor acidic but neutral. Check the answer to one of the similar questions on Yahoo answers at the following page.
716967
It has to do with the definition of pH, which is negative one times the base ten log of the concentration of H+ ions in a solution.  The dissociation constant of water happens to be 1.011 x 10^-14, yielding a pH of 6.99, or experimentally 7.  It is essentially a coincidence.  If the dissociation constant of water hadn't been near a power of ten, there would probably be a normalization constant involved, and the scale could be centered on zero or any other arbitrary value.
936672
The pH level. 7 is neutral. Below 7 is acidic and above 7 is basic. 1 being most acidic and 14 being most basic.
1029104
acid has a ph value below 7\nand alkali has a value above 7\n\nAn acid (often represented by the generic formula HA) is traditionally considered any chemical compound that when dissolved in water, gives a solution with a pH of less than 7. That approximates the modern definition of Brønsted and Lowry, who defined an acid as a compound which donates a hydrogen ion (H+) to another compound (called a base). Common examples include acetic acid (in vinegar) and sulfuric acid (used in car batteries). Acids generally taste sour;\n\nIn chemistry, an alkali (from Arabic: al-qaly القالي) is a specific type of base, formed as a carbonate, hydroxide or other basic (pH greater than 7) ionic salt of an alkali metal or alkali earth metal element. The word alkali or the adjective alkaline are frequently used to refer to all bases, since most common bases are alkalis, although strictly speaking this is inaccurate.
182906
pH is negative log of the concentration of hydrgen ions.\n\nSo pH of 1 would mean 10^(-1) or 0.1 concentration of hydrogen ion.\n\npH of 14 would mean 10^(-14) or 0.00000000000001 concentration of hydrogen ions.\n\nThat would mean that with a no. between 1 and 14 we can express a very wide range of concentrations.
803736
A universal indicator is simply something that will have a color change over a wide range of pH.  The most common universal indicator will show red at a very low pH (acidic) spanning to blue for very high pH ( basic).  Look at this web site for explanation.
133652
pH 6.5 sounds about right - it depends where you live and the degree of chlorination, etc.\n\nTry measuring it.
532756
The juice of the red cabbage is a natural indicator, with the transition from purplish to red/pink.  Don't recall at what pH, off the top of my head.
291060
The "point" of titration.\nAt a specific point: the chemical being titrated will reach the designated color.  The indicator will show how much was titrated at the point of color change.
868421
7.3 to 7.4\nBlood pH. The pH in which body cells can survive and function best.
784952
C\n\nthis is the definition of a strong acid.\n\nIt ionizes completely in water rather than entering into an equilibrium as a weak acid would do.
699777
http://en.wikipedia.org/wiki/PH
903570
Actually HCl is an acid even when it is in the gaseous state. The reaction of HCl gas with NH3 gas gives a cloud of the solid NH4Cl. In this reaction HCl, although it doesn't dissociate, it still donates its H+, so it is an acid according to the Bronsted-Lowry definition.\n\nIf the question is in the context of pH, then you should realize that pH and its 0-14 scale has a meaning only for aqueous solutions, so anyway it is not applicable to gases.\n\nYou should point out this to your teacher, since claiming that HCl gas is not acidic is wrong.
359316
Light intensity affects pH because a substance's acidity is affecting by the amount of heat that is exerted on it, which is light intensity in a way.