help convert meq

I need to convert this. I need 15 meq= ? ml if 20 meq=15ml

[Robert Fogt]

mEq is milliequivalent. Its a relative amount of substance.

I am not exactly sure how you would calculate the conversion, but I'm sure it depends on the substance. So you'll need to post additional information.

If you post not just the substance, but also exactly what you are trying to do, it will make it easier for us to help.

I can't figure out this conversion for some home work and my text book is no help!
I need to administer Sodium Bicarb with a concentration of 0.45 ml/kg at a dose of 0.5 mEq/kg and I can't figure out how to convert between ml and mEq. Thanks.

[JohnS]

Originally Posted by Unregistered

I can't figure out this conversion for some home work and my text book is no help!
I need to administer Sodium Bicarb with a concentration of 0.45 ml/kg at a dose of 0.5 mEq/kg and I can't figure out how to convert between ml and mEq. Thanks.

The dose of 0.5 mEq/kg is mass-based dosing based on the patient's mass in kilograms. Sodium bicarbonate is NaHCO3, which ionized to Na+ and HCO3- in water. As each ion has a charge of 1 electron, 1 equivalent is the same as 1 mole. (NOT true when the ions have charge of 2 or 3). So the molar mass of 84.066 g/mol may be used in either direction to convert equivalents or moles to grams.

A "concentration" of 45 mL/kg does not make sense. I believe there is something wrong with this figure. Sodium bicarbonate is a solid powder. Concentration would be expressed as a mass, or number of moles in either a mass or volume of mixture. It is conceivable that at a specified strength, it is a mass-based dose.

meq/Kg to mval/g

10 mg of potassium = [How many?] meq ?

[JohnS]

Originally Posted by Unregistered

10 mg of potassium = [How many?] meq ?

For potassium, a mole and an equivalent are the same amount (because the valence of the potassium ion is +1). The molar mass is 39.0983 g.

Thus 10 mg x 1 mol/39.0983 g = 256 µmol ( or µEq)
So 0.256 mEq

1 meq in ml

Originally Posted by Unregistered

1 meq in ml

1meq sadabicarb is equal to how many mmoles

[JohnS]

Originally Posted by Unregistered

1meq sadabicarb is equal to how many mmoles

Do you mean sodium bicarbonate? If so 1 eqv = 1 mol.