a compound that yields OH- ions in solution or a solution in which the concentration of OH- exceeds H+.
An ion or compound that removes ions from solution. Often bases are substances that release hydroxide ions ( OHâ€“). Bases have pH values above 7. They are the opposite of acids.
a substance capable of reacting with an acid to form a salt. A typical base is sodium hydroxide (caustic), with the chemical formula MOH. For example, sodium hydroxide combines with hydrochloric acid to form sodium chloride (a salt) and water.
A compound that produces hydroxide ions in water solution.
neturalize acids producing a salt; cause high pH. Examples: lye, -OH, ammonia
See Bronsted base or Lewis base.
A substance that can accept protons (hydrogen ions) from a solution, thus lowering the overall H+ concentration. Any solution with a pH above 7 is considered basic, such as ammonia and bleach.
alkali; alkaline; basic. Compare with acid. a compound that reacts with an acid to form a salt. a compound that produces hydroxide ions in aqueous solution (Arrhenius). a molecule or ion that captures hydrogen ions.(Bronsted-Lowry). a molecule or ion that donates an electron pair to form a chemical bond.(Lewis).
Bases are chemicals that have a large concentration of hydroxyl (one hydrogen plus one oxygen atom) ions. A basic compound has a pH of more than 7 on a scale of 0 to 14. Strong bases, pH closer to 14, are corrosive. Weak bases, with pH closer to 7, are not. An acid can neutralize the effects of a base.
a substance that combines with H+ ions; has a pH greater than 7. J K Y Z
Insulating layer of a printed circuit board. Also, a substance dissolved in water that produces hydroxyl ions comprising an atom of oxygen and an atom of hydrogen.
A set dollar amount to cover the cost of health care per covered person excluding mental health/substance abuse services, pharmacy and administrative charges.
a compound that decreases the number of hydrogen ions (H+) in solution with water; all bases have a pH above 7
a substance that produces hydroxide ions in aqueous solution, a proton acceptor
The major constituent, other than pigments and filler, comprising the non-volatile portion of an adhesive coating or sealer compound.
substance that in water solution tastes bitter, and is slippery to the touch; reacts with acid to form a salt
Historically, base is a substance that yields an OH - ion when it dissociates in solution, resulting in a pH7. In the Brønsted definition, a base is a substance capable of accepting a proton in any type of reaction. The more general definition, due to G.N. Lewis, classifies any chemical species capable of donating an electron pair as a base. Typically, bases are metal oxides, hydroxides, or compounds (such as ammonia) that give hydroxide ions in aqueous solution.
a solution that has a pH value greater than 7
compound that yields hydroxide (OH- ) ions when in aqueous solution. Bases have a bitter taste, feel greasy and turn red litmus blue.
Substances that (usually) liberate OH anions when dissolved in water. Bases 1) react with acids to form salts; 2) have a pH greater than 7.0; 3) turn litmus paper blue; and 4) may be corrosive to tissue. A strong base is called alkaline or caustic.
A compound which has a pH more than 7. See pH.
(1) A substance which can accept a proton (hydrogen ion; H+) in solution. (Contrast with acid.) (2) In nucleic acids, a nitrogen-containing molecule that is attached to each sugar in the backbone. (See purine; pyrimidine.)
a compound that combines with acids to form salts; neutralizes the effects of acids.
Any compound that will combine with an acid and neutralize it, forming a salt; also bottom or support for any structure. [1/7] Home | News | Tools| Careers | Events | Suppliers | Properties | Equipment | Companies | Commodities | Forums
A compound whose dissociation releases a hydroxide ion (OH-) or removes a hydrogen ion (H+) from the solution.
A compound capable of accepting a hydrogen ion (H+).
A substance with a pH above 7.0. Substances with a base pH include soap(pH 10.0) and ammonia (pH 11.2).
(1) A substance which takes up or accepts protons. . (2) A substance containing hydroxyl ions which reacts with an acid to form a salt or which may react with metals to form precipitates. (3) A substance which dissociates (separates) in aqueous solution to yield hydroxyl ions (O ¯)
any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water; "bases include oxides and hydroxides of metals and ammonia"
a chemical compound that eitherdonates hydroxide ions or absorbs hydrogen ions when dissolved in water
a chemical that ionize in aqueous solutions to form OH- ions
a compound that combines with hydrogen ions in solution
a compound that gives off negatively charged hydrogen ions when dissolved in water, and an acid is a compound that gives off positively charged hydrogen ions when dissolved in water
a compound that produces hydroxide(hy DRAHK syd) ions (OH-) when disolved in water
a compound that reacts with and neutralises an acid
a molecule that accepts a proton in solution
a simple compound made up of nitrogen and carbons
a species that accepts protons, while an acid is a species that dontates protons
a substance that buffers acids
a substance that can absorb or accept hydrogen ions from the surrounding aqueous environment
a substance that can remove a proton from an acid
a substance that contributes hydroxyl ions, OH-, to a solution
a substance that decreases the concentration of hydrogen ions, in other words, increasing the concentration of hydroxide ions OH-
a substance that gives OH - ions when dissolved in water
a substance that produces an OH - when it is dissolved in water (Arrhenius)
a substance that releases hydroxide ions (OH-) into solution
a substance that, when dissolved in water, forms hydroxide ions (OH - )
a substance that when dissolved in water increases the concentration of the hydroxide ion, OH -
a substance, usually a granular product, which has the ability of raising the pH of water
a substance which can accept a proton from other substances
a substance which combines with hydrogen ions
a substance which is composed of a metal, or positive has an acrid taste
a substance which is composed of a metal, or positive radical, and OH
a substance which reacts with an acid to form a salt and water
Compound that when dissolved in water forms hydroxide ions (OH-). A base aqueous solution always has a pH higher than 7. The base aqueous solutions are designated by alkaline solutions.
Substance which gives off hydroxide ions (OH-) in solution.
a base is a term used in chemistry to describe a chemical that raises the pH of a solution. Bases interact with other chemicals by accepting hydrogen atoms or donating electrons.
Any substance that has a pH level above 7, or has more free hydroxide ions (OH-) than hydrogen ions (H+).
A substance with the following characteristics: Releases OH anions in water; reacts with acids to form salts and water; has a pH 7.0, neutralizes acids and may be corrosive to tissue (feels "slippery").
a classification of substances which when combined with an acid will form a salt plus water, usually producing hydroxide ions when dissolved.
A solution that has a pH greater than 7; capable of reducing the amount of acid in a substance
A substance that reacts with acid to produce a salt and water only. It does this by accepting a hydrogen ion from the acid. An example is ammonia which accepts a proton to become the ammonium ion - NH4
A chemical substance with a pH greater than 7. Bases can neutralize acids, and strong bases like lime are corrosive.
a substance that turns hydoin or pH paper blue.
A substance that (1) liberates hydroxyl ions when dissolved in water; (2) that liberates negative ions of various kinds in any solvent; (3) that receives a hydrogen ion from a strong acid to form a weaker acid; (4) that gives up two electrons an acid, forming a covalent bond with the acid.
A molecule that releases hydroxide ions into water. 40
1: in semiconductor manufacturing chemicals, a substance that dissociates in water to liberate hydroxyl ions, accepts a proton, has an unshared pair of electrons, or reacts with acid to form a salt. A base has a pH greater than 7 and turns litmus paper blue. 2: in facilities and safety, a corrosive material with the chemical reaction characteristic of an electron donor. 3: in quartz and high temperature carriers, the material at the bottom of a wafer carrier on which the wafer carrier rests when placed on a flat surface. 4: of a cerdip or cerpack package, the bottom ceramic portion. A leadframe, a window frame, and the cap are attached to the base-generally with devitrifying solder glass-during package/device manufacture.
A substance that may have a bitter taste, feels soapy, and neutralizes acids.
a substance that releases OH- ions in solution in water (Arrhenius).
A substance that has a pH above 7. Base chemicals are composed of negatively charged ions (electrically charged molecules).
A substance that releases hydroxyl ions when dissolved in water. Bases react with acids to form salt and water.
a chemical that has a bitter taste when aqueous, changes the color of acid-base indicators, feels slippery in dilute aqueous solutions, reacts with acids to produce salts and water, and conducts electric current. An Arrhenius base is a chemical compound that increases the concentration of hydroxide ions (OH-) in aqueous solution. Brønsted-Lowry bases are molecules or ions that are proton acceptors. A Lewis base is an atom, ion or molecule that donates an electron pair to form a covalent bond.
A chemical substance that yields hydroxyl ions (OH) when dissolved in water. Compare with acid.
A substance that lowers the hydrogen ion concentration in a solution.
(Arrhenius definition) any substance that, when dissolved in.water, increases the concentration of hydroxide ion, OH-. (Bronsted-Lowry definition) The species (molecule or ion) that accepts a proton in a protontransfer reaction
Chemicals that react with acid to produce a salt. The opposite of acid.
Any chemical capable of accepting or receiving a hydrogen ion from another substance. Any substance with a pH of more than 7.
a chemical species which can bind protons (Bronsted base); a chemical species which has a 'lone pair' of electrons available for dative bonding (Lewis base).
a substance that has a pH value between 7 and 14
In genetics, 'base' denotes the nitrogen-containing (nitrogenous) chemical compounds that make up DNA - adenine, cytosine, guanine and thymine. In chemistry generally, bases include a much larger group of chemicals (including the four found in DNA) which share the common property of bonding to hydrogen ions when in solution.
A substance that accepts hydrogen ions when dissolved in water (compare with acid).
A compound that reacts with a protonic acid to give water (and a salt). Typically, bases are metal oxides, hydroxides or compounds (such as ammonia) that give hydroxide ions in aqueous solution.
the alkali used to react with the fats or oils to make soap
1) A substance that when dissolved yields an alkaline solution 2) Organic molecules that form part of a DNA or RNA molecule. The precise sequence of bases contains the genetic information.
A substance that forms a salt when it reacts with acid. A base is a substance that removes hydrogen ions (protons) from an acid and combines with them in a chemical reaction.
a solution which has an excess of hydroxide ions (OH-) in aqueous solution.
A base is a proton acceptor. It turns litmus blue. Back to top of the page
also basic – Chemical substance that releases hydroxyl ions ()when dissolved in water. A class of compounds which will react with an acid to give a salt. A reaction between an acid and a base is called a neutralization. Kind of the opposite of an acid. All liquids with a pH more than 7.0 are basic or base.
Chemical compounds that have a pH of greater then 7. Bases are also referred to as alkalis or caustic materials and can be corrosive to human tissue.
A substance which accepts protons (H+) and has a pH greater than 7 on a scale of 0-14; also referred to as an alkaline substance.
Those chemicals of alkaline nature which will counteract the pH of an acid, eventually neutralizing at 7.0. Common bases used around the pool would include Soda Ash, Sodium Bicarbonate, Sodium Carbonate and Sodium Sesquicarbonate.
corrosive material that reacts with acid to form a salt and water. A base has a pH greater than 7.
A substance that produces OH (aq) ions in aqueous solution. Strong soluable bases are soluble in water and are completely dissociated. Weak bases ionize only slightly.
a substance that has a pH of more than 7, which is neutral. A base has less free hydrogen ions (H+) than hydroxyl ions (OH-).
1. The fundamental number of characters available for use in each digital position in a numbering system. 2. A chemical substance that hydrolyses to yield OH- ions. 3. A number that is multiplied by itself as many times as indicated by an exponent.
a base is a substance that can combine with a proton.
In the Bronsted definition, a base is a chemical species that can accept a proton from another species. In the Lewis definition, a base is a chemical species that can donate and share a pair of electrons with another species. See 'Acid'
A substance that produces hydroxide ions (OH-) in aqueous solution. The pH values of bases are between 8 and 14. Strong bases have a higher pH and are more corrosive than weak bases. Examples of strong bases include sodium hydroxide, and ammonium hydroxide. See also pH, Acid, Corrosive.
A substance with a pH higher than 7, and which has a high concentration of hydroxyl ions. Bases react with acids to form a salt and water (called neutralisation). Metal hydroxides, oxides and carbonates are all bases. Useful products from air
A compound that reacts with an acid to form a salt. It is another term for alkali.
a material that neutralizes acids. Also, term referring to an oil additive containing colloidally dispersed metal carbonate, used to reduce corrosive wear.
a bitter tasting substance (and often slimy) - the opposite of a acid substance. Base solutions will turn a litmus blue.
(1) Substance having a pH greater than 7. (2) Substance that releases hydroxide ions (OH-).
An alkali which releases hydroxyl ions when dissolved in water.
A chemical substance that yields hydroxyl ions when dissolved in water. Raises the pH.
Generally, a substance that reacts with acids to form a salt, several different definitions of bases have been proposed by different scientists (listed in parentheses). 1) (Arrhenius) a compound that releases hydroxide ions (OH-) in solution; 2) (Brønsted-Lowry) a molecule or ion that accepts hydrogen ions from solution; 3) (Lewis) a molecule or ion that donates an electron pair to an acid.
An acid neutralizing substance such as an antacid (See Bicarbonate, Citrate).
A hydroxide-containing corrosive material that, when in a water solution, is bitter, more or less irritating or caustic to the skin. A chemical compound that reacts with an acid to form a salt. The term is applied to the hydroxides of the metals, to certain metallic oxides, and to groups of atoms containing one or more hydroxyl groups (OH-) in which hydrogen is replaceable by an acid radical. Sodium hydroxide is an example of a base. See Alkaline.
Any substance that accepts hydrogen ions in solution. A base has a number higher than 7 on the pH scale.
In chemistry, a base is most commonly thought of as a substance which can accept protons. This refers to the Bronsted-Lowry theory of acids and bases. Alternate definitions of bases include electron pair donors (Lewis), and as sources of hydroxide anions (Arrhenius).