(1) Percent from weight and volume

3. Percent, Ratio, mg/mL, PPM, PPB 3.1) Percent 3.1.1) Percent - General

3.1.1.1) Percent from weight and volume Easy 1


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If 3426.5 milligrams of drug is present in 445 milliliter of an aromatic elixir, then determine the strength in percent `w/v`


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lb equals 0.77 % kg

    3426.5 mg equals `3426.5/1000` or 3.4265 g of drug. Percentage (w/v) means number of grams of drug present per 100 mL of the solution.

    `∴ (3.4265 \quad g)/(445 \quad mL) = x/(100 \quad mL) ⇒ x = 0.77 \quad g`

    ∴ the concentration would be `0.77 % w/v` (Ans).