Gen CHEM : Normality concept

[A6project]

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Hi, I am really confused about normality. We never learned this when I took chem in freshman yr. 🙁

"Normality is the numbers of gram equivalent weights of solute per liters of solution." -quoted from KBB

what is a gram equivalent weight? I read the explantions, but still struggle to grasp the concept.

Thanks!!!

 

[Baylor2011]

Blah...my textbook doesn't even have normality in the index?

 

[LuckMC11]

from wikipedia:

"Normality highlights the chemical nature of salts: in solution, salts dissociate into distinct reactive species (ions such as H+, Fe3+, or Cl-). Normality accounts for any discrepancy between the concentrations of the various ionic species in a solution. For example, in a salt such as MgCl2, there are two moles of Cl- for every mole of Mg2+, so the concentration of Cl- is said to be 2 N (read: "two normal"). Further examples are given below. It may also refer to the concentration of a solute in any solution. The normality of a solution is the number of gram equivalent weight of a solute per liter of its solution. The definition of normality depends on the exact reaction intended.

For example, hydrochloric acid (HCl) is a monoprotic acid and thus has 1 mol = 1 gram equivalent. One liter of 1 M aqueous solution of HCl acid contains 36.5 grams HCl. It is called 1 N (one normal) solution of HCl."