Question

1.) A 5% (w/v) dextrose IV fluid (D5W) contains 20 mEq K+ per liter of solution....

1.) A 5% (w/v) dextrose IV fluid (D5W) contains 20 mEq K+ per liter of solution. If a patient received 420 mL of this IV solution, how many millimoles of K+ were delivered ?


2.) A 25.0 mL multidisciplinar vial of a medication is available containing 500mg of a drug dissolves in normal saline. What is % (w/v) concentration of this preparation?

3.) How many grams of insulin are present in 5.0g if 0.450% (w/w) solution?


Can you please show how to do this by using conversion factors/dimensional analysis ? Thank you!



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Answer #1

1).

As per the given information, the concentration of potassium in the given solution is, 20 milli equivalents (mEq) per a liter or 1000 mL.

Thus, the concentration of potassium in 420 mL solution is = (20 × 420) / 1000 = 8.4 mEq

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