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You are here: Home / Explanatory Dictionary / PH

PH

the reciprocal of the logarithm of the hydrogen ion concentration. The ph scale is from zero to 14,and 7.0 is the neutral point, indicating the presence of equal concentrations of free hydrogen and hydroxide ions, ph values below 7.0 indicate increasing acidity, and ph values above 7.0 indicate increasing base concentrations.

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Definitioner

PH
the reciprocal of the logarithm of the hydrogen ion concentration. The ph scale is from zero to 14,and 7.0 is the neutral point, indicating the presence of equal concentrations of free hydrogen and hydroxide ions, ph values below 7.0 indicate increasing acidity, and ph values above 7.0 indicate increasing base concentrations.
Neutral
in electrical systems, the term used to indicate neither an excess or lack of electrons; a condition of balance between positive and negative charges. In chemistry, the term used to indicate a balance between acids and bases; the neutral point on the ph scale is 7.0 indicating the presence of equal numbers of free hydrogen (acidic) and hydroxide (basic) ions.
Ion
an atom, or group of atoms which function as a unit, and has a positive or negative electrical charge, due to the gain or loss of of one or more electrons.
Hydroxide
a chemical compound of an element or elements with the hydroxyl (oh) anion.
Hydrogen Ion Concentration
the concentration of hydrogen ions in moles per liter of solution; often expressed as ph.
Base
A substance which releases hydroxyl ions when dissolved in water. Bases react with acids to form a neutral salt and water.