If the available concentration is 250 mg/mL and you need 500 mg, how many mL will you administer?

If the available concentration is 250 mg/mL and you need 500 mg, how many mL will you administer?

• A. 1 mL
• B. 2 mL
• C. 3 mL
• D. 4 mL

Answer: (B)

To determine how many mL you need to administer to achieve a dose of 500 mg from a concentration of 250 mg/mL, you can use the formula: \[ \text{Volume (mL)} = \frac{\text{Desired Dose (mg)}}{\text{Concentration (mg/mL)}} \] In this scenario, you would substitute the values: \[ \text{Volume (mL)} = \frac{500 \text{ mg}}{250 \text{ mg/mL}} = 2 \text{ mL} \] This calculation shows that to administer a total of 500 mg of the medication when it is available at a concentration of 250 mg per mL, you will need to give 2 mL. This is directly derived from understanding the relationship between dosage and concentration, reinforcing critical skills in dosage calculation essential for safe medication administration.

To determine how many mL you need to administer to achieve a dose of 500 mg from a concentration of 250 mg/mL, you can use the formula:

[

\text{Volume (mL)} = \frac{\text{Desired Dose (mg)}}{\text{Concentration (mg/mL)}}

]

In this scenario, you would substitute the values:

[

\text{Volume (mL)} = \frac{500 \text{ mg}}{250 \text{ mg/mL}} = 2 \text{ mL}

]

This calculation shows that to administer a total of 500 mg of the medication when it is available at a concentration of 250 mg per mL, you will need to give 2 mL. This is directly derived from understanding the relationship between dosage and concentration, reinforcing critical skills in dosage calculation essential for safe medication administration.