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Unformatted text preview: PHCY 6106 PRACTICE PROBLEMS
Milliequivalents and Milliosmols 1. A patient weighing 154 Lb is to receive 0.2 mEq/Kg of body weight of calcium gluconate. (1
kg = 2.2 Lb)
a. How many milliliters of a 25% solution of calcium gluconate should be added to the
patient’s infusion solution to provide the prescribed amount?
b. How many milliosmols of calcium are represented in the volume received by the
patient?
2. A parenteral admixture solution contains, in each 5mL, 0.5 g of potassium acetate, 0.05 g of
potassium bicarbonate, and 0.5 g of potassium citrate. How many total milliequivalents of
potassium (K+) are represented in each 5mL of the solution?
3. A 40mL vial of sodium chloride solution was diluted to 1 liter with sterile distilled water. The
concentration (w/v) of sodium chloride (NaCl) in the finished product was 0.585%. What
was the concentration, in milliequivalents per milliliter, of the original solution?
4. A certain electrolyte solution contains 0.9% of sodium chloride in 10% dextrose solution.
a. Express the concentration of sodium chloride (NaCl) in terms of milliequivalents per
liter.
b. How many milliosmols of dextrose, a nonelectrolyte (m.w.=180), are represented in
1 liter of the solution?
5. A patient is to receive 10mEq of potassium gluconate (C 6 H 11 KO 7 – m.w. 234) four times a
day for 3 days. If the dose is to be 1 teaspoonful in a cherry syrup vehicle:
a. How many grams of potassium gluconate should be used to prepare the Rx?
b. What volume, in milliliters, should be dispensed to provide the prescribed dosage
regimen?
6. Ringer’s solution contains 0.33g of calcium chloride per liter.
a. Express the concentration in terms of milliequivalents of calcium chloride per liter.
b. How many milliosmoles of calcium are represented in each liter of the solution?
7. Calculate the osmolarity, in milliosmoles per milliliter, of a parenteral solution containing
2mEq/mL of potassium acetate.
8. What is the osmolarity of an 8.4% (w/v) solution of sodium bicarbonate?
9. A hospital medication order calls for the administration of 100g of mannitol, a nonelectrolyte (m.w. 182) to a patient as an osmotic diuretic over 24hour period. Calculate:
a. How many milliliters of a 15% (w/v) mannitol injection should be administered per
hour?
b. How many milliosmoles of mannitol would be represented in the prescribed dosage?
10. Ammonium chloride is used as a urinary acidifier with a dose of 150 mEq. How many 500mg tablets should be administered? Teixeira 1 PHCY 6106 PRACTICE PROBLEMS
Milliequivalents and Milliosmols ANSWERS:
1) a) 12.04 = 12 ml; b) 6.98 = 7 mOsmol
2) 7.23 mEq of K+
3) 2.5mEq/mL
4) a) 153.85 =154mEq/L; b) 555.5 = 556mOsmol
5) a) 28.08g; b) 60mL
6) a) 5.94 mEq/L; b) 2.97 mOsm/L of Ca+
7) 4 mOsm/mL
8) 2000 mOsm/L
9) a) 27.8 mL/hr; b) 549.5=550 mOsm
10) 16 tabs Teixeira 2 ...
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This note was uploaded on 10/15/2010 for the course PHCY 6106 taught by Professor Teixeira during the Fall '10 term at Pima CC.
 Fall '10
 Teixeira

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