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The common (Arrhenius) definition of a base is a chemical compound that either donates hydroxide ions or absorbs hydrogen ions when dissolved in water. Bases and acids are referred to as opposites because the effect of an acid is to increase the hydronium ion concentration in water, whereas bases reduce this concentration. Arrhenius bases are water-soluble and always have a pH greater than 7 in solution. An acid (often represented by the generic formula AH) is typically a water-soluble, sour-tasting chemical compound. ...
An acid-base reaction is a chemical reaction between an acid and a base. ...
PH or ph or pH or Ph may be: In chemistry, pH is a measure of acidity. ...
The self-ionization of water is the chemical reaction in which two water molecules react to produce a hydronium (H3O+) and a hydroxide ion (OH-): The reaction is also known as the autoionization or autodissociation of water. ...
Buffer solutions are solutions which resist change in pH upon addition of small amounts of acid or base. ...
There are millions of possible objects that can be described in science, too many to create common names for every one. ...
The most fundamental reactions in chemistry are the redox processes. ...
Electrochemistry is the study of the electronic and electrical aspects of chemical reactions. ...
A strong acid is an acidic compound which ionizes completely in an aqueous solution. ...
A weak acid is an acid that does not fully ionize in solution; that is, if the acid was represented by the general formula AH, then in aqueous solution a significant amount of undissolved AH still remains. ...
In chemistry, a strong base is a compound with a very high pH value. ...
In chemistry, a weak base is a chemical base that does not ionize fully in an aqueous solution. ...
Svante August Arrhenius (February 19, 1859 – October 2, 1927) was a Swedish chemist and one of the founders of the science of physical chemistry. ...
A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. ...
Hydroxide is a functional group consisting of oxygen and hydrogen: -O−H It has a charge of 1-. The term hydroxyl group is used when the functional group -OH is counted as a substituent of an organic compound. ...
General Name, Symbol, Number Hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1 (IA), 1 , s Density, Hardness 0. ...
An acid (often represented by the generic formula AH) is typically a water-soluble, sour-tasting chemical compound. ...
Hydronium is the common name for the cation H3O+. Nomenclature According to IUPAC ion nomenclature, it should be referred to as oxonium. ...
There are other more generalized and advanced definitions of acids and bases. An acid-base reaction is a chemical reaction between an acid and a base. ...
Common bases
Sodium bicarbonate (NaHCO3), or sodium hydrogen carbonate, also known as baking soda and bicarbonate of soda, is a soluble white anhydrous or crystalline compound, with a slight alkaline taste resembling that of sodium carbonate. ...
Sodium carbonate or soda ash, Na2CO3, is a sodium salt of carbonic acid. ...
Ammonia is a chemical compound with the formula N H3. ...
Ammonia Amines are organic compounds containing nitrogen as the key atom in the amine functional group. ...
Pyridine is a clear liquid with a strong and very unpleasant odor that is used as a solvent and reagent in organic chemistry. ...
Basic aromatic rings are aromatic rings in which the lone pair of electrons of a ring_nitrogen atom is not part of the aromatic system and extends in the plane of the ring. ...
For alternative meanings see metal (disambiguation). ...
Hydroxide is a functional group consisting of oxygen and hydrogen: -O−H It has a charge of 1-. The term hydroxyl group is used when the functional group -OH is counted as a substituent of an organic compound. ...
Sodium hydroxide (NaOH), also known as caustic soda or lye in North America, is a caustic metallic base used in industry (mostly as a strong chemical base) in the manufacture of paper, textiles, and detergents. ...
The chemical compound potassium hydroxide, (KOH) sometimes known as caustic potash, potassa, potash lye and potassium hydrate, is a metallic base. ...
An oxide is a chemical compound of oxygen with other chemical elements, e. ...
Bases and pH The pH of (impure) water is a measure of its acidity. In pure water, about one in ten million molecules dissociate into hydrogen ions (H+) and hydroxide ions (OH−), according to the equation PH or ph or pH or Ph may be: In chemistry, pH is a measure of acidity. ...
For alternative meanings see acid (disambiguation). ...
Hydronium is the common name for the cation H3O+. Nomenclature According to IUPAC ion nomenclature, it should be referred to as oxonium. ...
Hydroxide is a functional group consisting of oxygen and hydrogen: -O−H It has a charge of 1-. The term hydroxyl group is used when the functional group -OH is counted as a substituent of an organic compound. ...
The concentration (in mole/liter) of the ions is indicated as [H+] and [OH−]; their product is the dissociation constant of water with and has the value 10−14 mole2/l2. The pH is defined as −log [H+]; thus, pure water has a pH of 7. (These numbers are correct at 23 °C and slightly different at other temperatures.) This page refers to concentration in the chemical sense. ...
The mole (symbol: mol) is one of the seven SI base units and is commonly used in chemistry. ...
The litre (or liter in US) is a metric unit of volume. ...
This article needs cleanup. ...
A base accepts (removes) hydrogen ions (H+) from the solution, or donates hydroxide ions (OH−) to the solution. Both actions will lower the concentration of hydrogen ions, and thus raise pH. By contrast, an acid donates H+ ions to the solution or accepts OH−, thus lowering pH. Hydronium is the common name for the cation H3O+. Nomenclature According to IUPAC ion nomenclature, it should be referred to as oxonium. ...
Hydroxide is a functional group consisting of oxygen and hydrogen: -O−H It has a charge of 1-. The term hydroxyl group is used when the functional group -OH is counted as a substituent of an organic compound. ...
The pH of a solution can be calculated. For example, if 1 mole of sodium hydroxide (40 g) is dissolved in 1 liter of water, the concentration of hydroxide ions becomes [OH−] = 1 mole/l. Therefore [H+] = 10−14 mol/l, and pH = −log 10−14 = 14. Sodium hydroxide (NaOH), also known as caustic soda or lye in North America, is a caustic metallic base used in industry (mostly as a strong chemical base) in the manufacture of paper, textiles, and detergents. ...
G is the seventh letter in the Roman alphabet. ...
Neutralization of acids When dissolved in water, sodium hydroxide decomposes into hydroxide and sodium ions: Sodium hydroxide (NaOH), also known as caustic soda or lye in North America, is a caustic metallic base used in industry (mostly as a strong chemical base) in the manufacture of paper, textiles, and detergents. ...
and similarly, hydrochloric acid forms hydronium and chloride ions: The chemical hydrochloric acid is a highly acidic aqueous solution of hydrogen chloride (HCl). ...
When the two solutions are mixed, the H+ and OH− ions combine to form water molecules: If equal amounts of NaOH and HCl (measured in moles, not grams) are dissolved, the base and the acid exactly neutralize, leaving only NaCl (table salt) in solution. Sodium chloride, also known as common salt, table salt, or halite, is a chemical compound with formula NaCl. ...
Alkalinity of non-hydroxides Both sodium carbonate and ammonia are bases, although neither of these substances contains OH− groups. That is because both compounds accept H+ when dissolved in water: Sodium carbonate or soda ash, Na2CO3, is a sodium salt of carbonic acid. ...
Ammonia is a chemical compound with the formula N H3. ...
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See also - Acid-base reaction theories
- Alkali
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