Weegy: standard solution is a solution containing a precisely known concentration of an element or a substance i.e., a known weight of solute is dissolved to make a specific volume. It is prepared using a standard substance, such as a primary standard. [ Standard solutions are used to determine the concentrations of other substances, such as solutions in titrations. The concentrations of standard solutions are normally expressed in units of moles per litre (mol/L, often abbreviated to M for molarity), moles per cubic decimetre (mol/dm3), kilomoles per cubic metre (kmol/m3) or in terms related to those used in particular titrations (such as titres). 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 titrant or titrator is prepared as a standard solution. A known concentration and volume of titrant reacts with a solution of analyte or titrand to determine concentration. ] (More)

Weegy: Agriculture is the cultivation of animals, plants, fungi and other life forms for food, fiber, and other products used to sustain life. (More)