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Equivalent concept

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ssssss:
In equivalent concept you use equivalents instead of moles.

Equivalents=mass/Equivalent weight

movies:
Wouldn't that calculation just give you the number of moles of whatever equivalent you were calculating for?

It doesn't seem to be so much a different method as a shortcut to do the same thing.

ssssss:
Yes its very similar to the mole concept.You only got to stick to one thing that is equal number of equivalents will react to give equal number of equivalents.

Equivalents=weight/Equivalent weight

Where equivalent weight=Molecular weight/n factor

Here n factor depends upon the nature of reagent.
For H2SO4 n=2[number of replacable H+ ions]
For NaOH n=1[number of replacable OH- ions]
For elements n=Valency
For salts n=Charge on cationic or anionic part.

This method is Extremely useful as it can be used without knowing the nature of reaction[no need of balancing].

But it can only be used if you know the n factor of the reagents correctly.

movies:
That's interesting.  I never thought of it before.

Doesn't that method also require that you know the limiting reagent ahead of time though?

ssssss:
Now see this reaction

A + B---->C + D

Suppose A and B are the reactants with equivalents x and y[x>y] then C and D Formed will be y equivalents.It does have a limiting reagent but the good thing is that there is not much difficulty in determining the limiting reagent as no balancing is required.

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