Milliequivalence



The Milliequivalence of any component is the number of milliequivalents of that component in 1000 cm3 (or 1 litre) of the total system.

You also need to be able to calculate the milliequivalence of solutions.

Extracellular fluid contains 0.178 grams of Bicarbonate ions (ionic weight 61.0) in 100 ml of fluid. What is the milliequivalence of the Bicarbonate?

Find out the weight of one milliequivalent of Bicarbonate.
Bicarbonate has a valency of 1 and an ionic weight of 61.0.
Thus the gram equivalent value for Bicarbonate is 61.0 grams.
Thus one milliequivalent of Bicarbonate weighs 61.0 milligrams.

Find how many milliequivalents of Bicarbonate there are in 100 ml of fluid.
Number of Milliequivalents =     Weight of Bicarbonate in mgs   
Milliequivalent of Bicarbonate
Number of Milliequivalents = 170.8 = 2.8 mEq
61.0

Find the number of millilequivalents in 1 litre of fluid.
100 ml of fluid contains 2.8 milliequivalents. Thus:
1000 ml of solution contains 1000/100 x 2.8 mEq = 28 mEq.
The concentration of Bicarbonate in the solution is 28 milliEquivalence.
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