If a vial contains 100 mg/mL, how much would be needed for a 2 mg dose?

If a vial contains 100 mg/mL, how much would be needed for a 2 mg dose?

• A. 0.02 mL
• B. 0.1 mL
• C. 0.5 mL
• D. 2 mL

Answer: (A)

To determine how much liquid is needed for a 2 mg dose from a solution that has a concentration of 100 mg/mL, the calculation involves using the formula: Volume = Desired Dose / Concentration. In this case, the desired dose is 2 mg and the concentration is 100 mg/mL. Plugging in these values gives: Volume = 2 mg / 100 mg/mL = 0.02 mL. This calculation indicates that to obtain a 2 mg dose from a vial that contains 100 mg of medication per mL, only 0.02 mL of the liquid is needed. By understanding this calculation, it becomes clear how to determine the appropriate volume based on dosage requirements and concentration available. Knowing how to manipulate the units and understand the relationship between mass, concentration, and volume is essential in nursing practice for safe medication administration.

To determine how much liquid is needed for a 2 mg dose from a solution that has a concentration of 100 mg/mL, the calculation involves using the formula:

Volume = Desired Dose / Concentration.

In this case, the desired dose is 2 mg and the concentration is 100 mg/mL. Plugging in these values gives:

Volume = 2 mg / 100 mg/mL = 0.02 mL.

This calculation indicates that to obtain a 2 mg dose from a vial that contains 100 mg of medication per mL, only 0.02 mL of the liquid is needed.

By understanding this calculation, it becomes clear how to determine the appropriate volume based on dosage requirements and concentration available. Knowing how to manipulate the units and understand the relationship between mass, concentration, and volume is essential in nursing practice for safe medication administration.