### (type 2) Calculate mEq per volume from mg or percent

5. mEq and mOsmol 5.1) mEq 5.1.1) mEq - General

5.1.1.1) mEq from weight/volume Normal 1

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A solution contains 4 mg of calcium chloride dihydrate in each 1 mL (the MW of calcium chloride dihydrate is 147). Express it as mEq/mL.

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lb equals 0.0544 mEq/mL kg

The molecular weight of calcium chloride dihydrate = 147.
Valence or charge = 2.
Therefore, we can write: 147 mg = 2 mEq.
Since the question needs mEq/mL as the final unit, we keep mEq in the starting numerator. So, 147 mg will be the denominator.
Also, the solution contains 4 mg per 1 mL. In order to cancel out mg, we need to keep 4 mg in the numerator of the second fraction. Therefore, the dimensional analysis will be like this:

(2 \quad mEq)/(147 \quad mg) × (4 \quad mg)/(1 \quad mL) =0.0544\quad (mEq)/(mL) Ans.

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