solution ... N=M×n n kase nikale H3po4 ki Normality ?
Hey,
N=M×n means molarity× number of moles.
So, if you don't know the number of moles then, another formula of finding normality is
N= [weight (gms)/equivalent weight] × [1000/ volume (lt)]
N = (M)(number of hydrogen or hydroxide ions)
For example, a 2 M H2SO4 solution will have a Normality of 4N (2 M x 2 hydrogen ions). A 2 M H3PO4, solution will have a Normality of 6N. How?
M=2 and n=3(3 moles of hydrogen)
So, 2×3=6
Hope this helps!
Reply
Dear Aspirant,
Normality = mass/eq.mass x 1000/volume of solutions( ml)
and Eq. mass = Molar mass/ n factor
or normality = Mass/ molar mass/ n factor x 1000/ volume of solution (ml) = mass/molar mass x 1000/ volume of solution (ml) x n factor = molarity x n factor
For H3PO4, n = 3
So normality = 1x3=3N
Thanks
All the very best
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