28. What volume, in tsp, of a 20 mEq/15 mL solution would deliver a dose of 40 mEq?
Answer: B
6 tsp of a 20 mEq/15 mL solution would deliver a dose of 40 mEq.
To achieve a dose of 40 mEq from a solution that has a concentration of 20 mEq per 15 mL, one would need to calculate the total volume required, which results in 6 tsp.
A) 2
Choosing 2 tsp would only provide a smaller volume than necessary to reach 40 mEq. Given the concentration, 2 tsp would yield much less than the required dose.
B) 6
This option is correct as it accurately reflects the amount of solution needed to deliver a total of 40 mEq. The calculations based on the concentration confirm that 6 tsp will provide the required dosage.
C) 30
Selecting 30 tsp far exceeds the required amount needed for a 40 mEq dose. This option is incorrect as it would provide an excessive volume.
D) 40
Option D is also incorrect because 40 tsp represents a volume that is significantly too high for delivering a dose of 40 mEq. The concentration indicates that much less volume is necessary.
Conclusion
The correct answer, 6 tsp, is derived from the necessary calculations based on the given concentration of the solution. All other options fail because they either provide insufficient volume or excessive amounts, demonstrating a misunderstanding of how to determine the appropriate dosage from the provided concentration.