Question

What is the molarity of 4n in sulphuric acid

Answer 1

Normality is a variation of molarity that includes an equivalence factor.

It is supposed to be calculated by Normality=M/f, where f is an equivalence factor.

Take sulfuric acid, for example. Since 0.5 mol of sulfuric acid is used to neutralize OH-, the factor is 0.5.

I do not like this format so I like to define it this way: Each sulfuric acid releases two protons so 1 mol of H2SO4 gives 2 mol of H+. The concentration of H+ is the normality.

Using this format we can see that 1 M HCl is 1 N HCl, 1 M NaOH is 1 N NaOH, 1 M H3PO4 is 3 N, 1 M of Ca(OH)2 is 2 N.

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