hydrogen ion concentration

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Noun1.hydrogen ion concentration - the number of moles of hydrogen ions per cubic decimeter
concentration - the strength of a solution; number of molecules of a substance in a given volume
pH, pH scale - (from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic);
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References in periodicals archive ?
The optimum conditions were established with total volume of 100 mL, temperature of 370, stirring rate of 400 rpm, hydrogen ion concentration of 1.980 mol*L-1, Rhizoma atractylodis macrocephalae dosage of 1.000 g, KBrO3 concentration of 0.05000 mol*L-1, MnSO4 concentration of 0.005600 mol*L-1 and CH3COCH3 of 1.00 mL by comparing difference of the electrochemical fingerprints of Rhizoma atractylodis macrocephalae from two choosen regions.
The term used to define the hydrogen ion concentration of any fluid is
1000 mg Radix Paeoniae Alba powders,0.084 g MnSO4, 1 mL acetone and 0.835 g KBrO3 were added successively under the conditions of stirring rate 500 rpm and hydrogen ion concentration 2.0 mol*L-1 while keeping the total volume 100 mL.
The central chemoreceptors respond to changes in cerebral spinal fluid of the hydrogen ion concentration (minus the log of the hydrogen ion concentration or pH).
It has been observed that the rate is also independent of the hydrogen ion concentration in the pH range of 3.8 to 4.8 (Table 4).
The colour of the juice changes in response to changes in its hydrogen ion concentration. Acids donate hydrogen ions in an aqueous solution turning the colour to red.