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Number of (mEq) based on mEq Weight
Weight		g
mEq Weight		g

Number of mEq		mEq
Number of mEq= Weight (g) / mEq weight (g)

Number of (mEq) based on Number of mmol
Number of mmol		mmol
Valence

Number of mEq		mEq
*Number of mEq = mmol valence**

mEq Weight
Atomic or Molecular weight		g
Valence

mEq weight		g
mEq weight (g) = Atomic weight (g) / Valence mEq weight (g) = Molecular weight (g) / Valence

Values for Some Important Ions
Ion or Compound	Formula	Valence	Atomic or formula weight	mEq Weight(mg)
Aluminum	Al⁺⁺⁺	3	27	9
Amonium	NH₄⁺	1	18	18
Calcium	Ca⁺⁺	2	40	20
Ferric	Fe⁺⁺⁺	3	56	18.7
Ferrous	Fe⁺⁺	2	56	28
Lithium	Li⁺	1	7	7
Magnesium	Mg⁺⁺	2	24	12
Potassium	K⁺	1	39	39
Sodium	Na⁺	1	23	23
Acetate	C₂H₃O₂^-	1	59	59
Bicarbonate	HCO3^-	1	61	61
Carbonate	CO3^{- -}	2	60	30
Chloride	Cl^-	1	35.5	35.5
Citrate	C₆H₅O₇^{- - -}	3	189	63
Gluconate	C₆H₁₁O₇^-	1	195	195
Lactate	C₃H₅O₃^-	1	89	89
Phosphate	H₂PO₄^-	1	97	97
	HPO₄^{- -}	2	96	48
Sulfate	SO₄^{- -}	2	96	48