Stock solution
Encyclopedia
In chemistry
, a stock solution is a large volume of a common reagent
, such as hydrochloric acid
or sodium hydroxide, at a standardized concentration
. This term is commonly used in analytical chemistry
for procedures such as titration
s, where it is important that exact concentrations of solutions are used. Stock solutions do not necessarily come in concentrations of simple numbers; for example a solution could be 0.10082 M HCl.
Also, in biochemistry
, the term is often used to refer to a concentrated solution, from which one can dilute into a working concentration.
Chemistry
Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties. Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds....
, a stock solution is a large volume of a common reagent
Reagent
A reagent is a "substance or compound that is added to a system in order to bring about a chemical reaction, or added to see if a reaction occurs." Although the terms reactant and reagent are often used interchangeably, a reactant is less specifically a "substance that is consumed in the course of...
, such as hydrochloric acid
Hydrochloric acid
Hydrochloric acid is a solution of hydrogen chloride in water, that is a highly corrosive, strong mineral acid with many industrial uses. It is found naturally in gastric acid....
or sodium hydroxide, at a standardized concentration
Concentration
In chemistry, concentration is defined as the abundance of a constituent divided by the total volume of a mixture. Four types can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration...
. This term is commonly used in analytical chemistry
Analytical chemistry
Analytical chemistry is the study of the separation, identification, and quantification of the chemical components of natural and artificial materials. Qualitative analysis gives an indication of the identity of the chemical species in the sample and quantitative analysis determines the amount of...
for procedures such as titration
Titration
Titration, also known as titrimetry, is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte. Because volume measurements play a key role in titration, it is also known as volumetric analysis. A reagent, called the...
s, where it is important that exact concentrations of solutions are used. Stock solutions do not necessarily come in concentrations of simple numbers; for example a solution could be 0.10082 M HCl.
Also, in biochemistry
Biochemistry
Biochemistry, sometimes called biological chemistry, is the study of chemical processes in living organisms, including, but not limited to, living matter. Biochemistry governs all living organisms and living processes...
, the term is often used to refer to a concentrated solution, from which one can dilute into a working concentration.