(3) Volume from percent and drug amount

3. Percent, Ratio, mg/mL, PPM, PPB 3.1) Percent 3.1.1) Percent - General Percent from weight and volume Easy 1

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If 1050 mg of drug is dissolved in 0.6% (w/v) of an antibiotic preparation, then determine its volume in mL.

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lb equals 175 mL kg

    Percentage (w/v) means number of grams of drug present per 100 mL of the solution. Here, the strength is 0.6 %, which means, there is 0.6 g of drug dissolved per 100 mL of an antibiotic preparation. We need to determine the volume (in mL) of an antibiotic preparation which will contain 1050 mg (equals to `1050 mg × (1g)/(1000mg) = 1.05 g`) of the drug.

    `∴ (100 \quad mL)/(0.6 \quad g) = x/(1.05 \quad g) ⇒ x = 175 \quad mL`

    ∴ The volume will be 175 mL (Ans).

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