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Topic: mEq  (Read 6849 times)

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whywhywhy

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mEq
« on: September 06, 2004, 01:02:39 PM »
hi guys!

does any of you know what mEq stands for?
for instance; 3.4 meq/L

thanks alot!




Demotivator

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Re:mEq
« Reply #1 on: September 06, 2004, 01:33:10 PM »
m stands for milli, which is a 1000 multiplier. mEq is milliEquivalents.
(3.4 mEq/L)( 1 Eq/1000 mEq) = .0034 Eq.
« Last Edit: September 06, 2004, 01:34:19 PM by Demotivator »

ssssss

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Re:mEq
« Reply #2 on: September 07, 2004, 04:43:58 AM »
As Demotivator has mentioned about milliequivalents.Here is the more detail matter:

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.

Offline Donaldson Tan

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Re:mEq
« Reply #3 on: September 08, 2004, 03:52:56 PM »
I know meq is used for measuring cation exchange capacity of soil. the unit is meq per 100g of silicate soil.
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