Question #87882
1 Answer
The normality is the number of gram equivalents in 1 L of solution.
Explanation:
Equivalent mass
A workable definition of equivalent mass (or equivalent weight) is:
the mass of one reactant in a balanced equation divided by the number of moles of another (this isn't the official definition).
Thus, equivalent mass depends on the reaction involved.
Gram equivalents
For example, in the reaction
The equivalent mass of
In the reaction
The equivalent mass of
An equivalent mass of a compound is often called an equivalent (eq) or a gram equivalent (geq).
If we call the number of moles of the other compound the n-factor, we can write
#color(blue)(bar(ul(|color(white)(a/a) "geq" = "molar mass"/"n-factor"color(white)(a/a)|)))" "#
Thus, for titration with
For precipitation
Normality
Normality is defined as the number of gram equivalents of a compound in 1 L of solution.
#color(blue)(bar(ul(|color(white)(a/a)N = "geq"/"litres"color(white)(a/a)|)))" "#
Thus, a
A