How many milliliters of full-strength Sustacal will the nurse use to prepare 250 mL of a 3/4-strength Sustacal solution?
1. 125 mL
2. 187.5 mL
3. 450 mL
4. 625.75 mL
2
Rationale 1: The nurse should use the equation 250 mL (sol) × 3 mL (solute)/4 mL (sol) = 187.5 mL (solute). The nurse would use 187.5 mL of full-strength Sustacal to make 250 mL of a ¾ strength solution.
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