(type 3) Calculate mg per volume from mEq per volume
5. mEq and mOsmol 5.1) mEq 5.1.1) mEq - General
5.1.1.1) mEq from weight/volume Normal 1
Total tried: Correct: Wrong:
If penicillin V potassium solution is expressed as 0.0052 mEq/mL, then how many milligram of penicillin V potassium will be present in each 1 mL of the solution? Round to the nearest tenth. The molecular weight of penicillin V potassium is 388 g/mol.
Click on the button below to see the answer and explanations
lb equals 2 mg/1mL kg
-
The molecular weight of penicillin V potassium = 388.
Valence or charge = 1.
Therefore, we can write: 388 mg = 1 mEq.
Since the question needs mg/1 mL as the final unit, we keep 388 mg in the starting numerator. So, 1 mEq will be the denominator.
Also, the solution contains 0.0052 mEq per mL; therefore, the mEq is used as the numerator for the second fraction, in order to cancel out. The dimensional analysis will be like this:
`(388 \quad mg)/(1 \quad mEq) × (0.0052 \quad mEq)/(1 \quad mL) × (1 \quad mL)/(1 \quad mL) = 2\quad (mg)/(1 \quad mL)` Ans.