Customized solution

A standard solution is a solution with a precisely determined content (e.g. 0.5  mol / l ) of a substance (e.g. HCl ). The content of a standard solution is determined with the help of a purest substance , also known as a Urtiter .

The nominal concentration of a standard solution is multiplied by a factor to obtain the effective concentration; this factor is called the titer . Standard solutions are used, for example, in volumetric titrations and, thanks to their accuracy, guarantee the addition of a defined amount of substance.

Sometimes the molarity is not used for standard solutions , but the equivalent concentration , out of date "normality". 1 N corresponds to an equivalent of 1 mol / l (1 H ⁺ , 1 e ^- or analogous). Sometimes transitional forms are also used, e.g. E.g .: 1 mol / l (1/2 H ₂ SO ₄ ) = 1 N (H ₂ SO ₄ ) = 1 mol / l H ⁺ .

Individual evidence

1. ↑ ^{a b} Entry on standard solution. In: Römpp Online . Georg Thieme Verlag, accessed on June 15, 2014.