Chapter 16. Calculating Milliequivalent, Millimoles and Milliosmoles (1 of 53) Sample Questions

1. How many milliequivalent of KCl is represented in a 15 mL dose of 10 % w/v KCl elixir? Mol. weight KCl = 74.5 g
  1. A. 20 mEq
  2. B. 39 mEq
  3. C. 74 mEq
  4. D. 16 mEq
Ans: A
Tips:
Equivalent weight = 74.5 g
1 mEq of KCL = 0.0745 grams =74.5 mg
15 mL dose of 10 % w/v elixir = 1.5 g or 1500 mg KCl
74.5 mg : 1 mEq = 1500 mg : x mEq
mg =(1500 mg x 1 mEq)/(74.5 mg)= 20.1 mEq ≈ 20 mEq