pH Terms
pH scale
A measure of acidity or alkalinity of water soluble substances (pH stands for 'potential of Hydrogen'). A pH value is a number from 1 to 14, with 7 as the middle (neutral) point. Values below 7 indicate acidity which increases as the number decreases, 1 being the most acidic.
H+
Acids add Hydrogen Ions (H+) to solutions. Hydrochloric acid (HCl) splits into Hydrogen Ions (H+) and Chloride Ions (Cl-). Extra H+ means acid solution (no more equal parts). the 1:1 ratio is changed, now there are too many H+, it turns acidic.
Base
Any of a class of compounds that form hydroxyl ions (OH) when dissolved in water, and whose aqueous solutions react with acids to form salts. Bases turn red litmus paper blue and have a pH greater than 7. Their aqueous solutions have a bitter taste.
Neutral
Belonging to neither kind; not one thing or the other; indifferent. Of or relating to a solution or compound that is neither acidic nor alkaline. Of or relating to a compound that does not ionize in solution. Of or relating to a particle, an object, or a system that has a net electric charge of zero.
OH-
Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water.
pH 7
Neutral solutions (such as pure water) have a pH of 7, acidic solutions have a pH lower than 7, and alkaline solutions have a pH higher than 7.
Acid
a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind.
pH 0-6.9
pH is a measure of hydrogen ion concentration; a measure of the acidity or alkalinity of a solution. The pH scale usually ranges from 0 to 14. ... A pH level of is 7.0 at 25°C is defined as 'neutral' because the concentration of H3O+ equals the concentration of OH− in pure water.
Orange juice
term:acid
Vomit
term:acid
battery acid
term:acid
chicken soup
term:acid
Drain cleaner
term:base
Soda
term:base
Hand soap
term:basic
Coffe
term:mostly base
Milk
term:neutral
Spit
term:neutral
Water
term:neutral
H30+
the hydrogen ion bonded to a molecule of water, H 3 O +, the form in which hydrogen ions are found in aqueous solution. Expand. Also called oxonium ion. Origin of hydronium ion.
