NABP Exam NAPLEX Topic 7 Question 34 Discussion

Actual exam question for NABP's NAPLEX exam

Question #: 34
Topic #: 7

[All NAPLEX Questions]

Calculate the Osmolarity of 3% hypertonic saline?

A1026 mOsmol/L

B76.9mOsmol/L

C287 mOsm/L

D565 mOsm/L

E327 mOsm/L

Show Suggested Answer

Suggested Answer: A

Osmolarity = mOsmol/L = (wt of substance (g/mL))/(MW(g/mol)) (# of particles) 1000 Weight of substance: 3% = (3g/100mL) = (xg/1000mL), x = 30g/L. # of particles NaCL: Na+ + Cl- (2 particles). mOsmol/L = (30g/L)/ (58.5g/mol) 2 1000 = 1,025.6. The answer is 1026 mOsmol/L.

by Paris at May 07, 2022, 01:11 PM

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