How do I prepare 2N NaoH




The normality (Unit symbol: N) is an outdated measure of concentration in chemistry, which is mainly used in redox and acid / base reactions. It is not part of the DIN standards. It was determined by the equivalent concentration (unit symbol: ceq) replaced.

Normality is the number of gram equivalents or val dissolved in one liter of a solution. A gram equivalent is the mass of substance that one mole of e.g. protons (H.+Ions) or donate or accept electrons.

In contrast to molarity, the degree of dissociation and valence, i.e. how many protons per molecule can be taken up or released, also play a role in the normality of an acid or base.

Like all volume-related content specifications, normality is also temperature-dependent.

definition

Normality is defined by the equation:

.

Here is N normality, c the molar concentration and z the value.

Examples

For example, to make a 1 N solution, 36.5 g HCl, 49 g H2SO4, 40 g NaOH or 85.5 g Ba (OH)2 so much solvent - usually water or alcohol - is added that exactly one liter of solution is produced.

Sodium carbonate (Na2CO3) consists of two sodium ions (Na+) and a carbonate ion. Thus, a 1 molar (M) sodium carbonate solution corresponds to a 2 normal (N) sodium carbonate solution based on the sodium ions (z = 2).

See also

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  • Hans R. Christen, Gerd Meyer: Basics of general and inorganic chemistry. Salle + Sauerländer, 1997, ISBN 3793554937
  • Frank H. Stepheson: Math in the laboratory. Elsevier Verlag, Munich 2004, ISBN 3-8274-1596-9

Category: Chemical quantity