Ph - translation to french
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Ph - translation to french

MEASURE OF THE ACIDITY OR BASICITY OF AN AQUEOUS SOLUTION
PH Scale; PH value; PH level; PH 7; ㏗; Acid and base; Acids and bases; Power of hydrogen; Pondus hydrogenii; PH balance; Ph Scale; PH Imbalance; Potential of hydrogen; Ph; Negative pH; Hydrogen-ion concentration; PH scale; Ph scale; Potentia Hydrogenii; Neutral solution; Potential Of Hydrogen; P.H.; P.h.; P H; PH strip; Potential hydrogen; Ocean acidity; Seawater scale; P.h. scale
  • Relation between pH and pOH. Red represents the acidic region. Blue represents the basic region.

Ph      
Ph, phenyl, group of chemical compounds derived from benzene (Chemistry)
pH      
PH, level of acidity (tested by checking the concentration of hydrogen ions in a solution by using indicators or electrodes)
phényle         
n. phenyl, group of chemical compounds derived from benzene (Chemistry), Ph

Definition

pH
¦ noun Chemistry a figure expressing acidity or alkalinity on a logarithmic scale on which 7 is neutral, lower values are more acid, and higher values more alkaline.
Origin
early 20th cent.: from p representing Ger. Potenz 'power' + H, the symbol for hydrogen (the pH being derived from the reciprocal of the hydrogen-ion concentration).

Wikipedia

PH

In chemistry, pH (), also referred to as acidity, historically denotes "potential of hydrogen" (or "power of hydrogen"). It is a scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions (solutions with higher concentrations of hydrogen (H+) ions) are measured to have lower pH values than basic or alkaline solutions.


The pH scale is logarithmic and inversely indicates the activity of hydrogen ions ( in the solution.

pH = log ( a H + ) log ( [ H + ] ) {\displaystyle {\ce {pH}}=-\log(a_{{\ce {H+}}})\thickapprox -\log([{\ce {H+}}])}


where [H+] is the equilibrium molar concentration (mol/L) of H+ in the solution. At 25 °C (77°F), solutions with a pH less than 7 are acidic, and solutions with a pH greater than 7 are basic. Solutions with a pH of 7 at 25 °C are neutral (i.e. have the same concentration of H+ ions as OH ions, i.e. the same as pure water). The neutral value of the pH depends on the temperature and is lower than 7 if the temperature increases above 25 °C. The pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases.


The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. Primary pH standard values are determined using a concentration cell with transference by measuring the potential difference between a hydrogen electrode and a standard electrode such as the silver chloride electrode. The pH of aqueous solutions can be measured with a glass electrode and a pH meter or a color-changing indicator. Measurements of pH are important in chemistry, agronomy, medicine, water treatment, and many other applications.

Examples of use of Ph
1. Claudia Bosse propose une «Ph';dre» totalement dénudée.
2. Ph';dre côtoie une érotomane notoire et on en redemande.
3. Elle est Ph';dre qui palpite pour son beau–fils Hippolyte.
4. Certes, Ph';dre est perdue, mais elle conserve une juste notion de sa dimension.
5. Face ŕ ce Ph';dre imposant, on se souvient que, dans «classique», le mot classe apparaît.