Pharmaceutics Calculations Practice Set #10 with Answers


Question 1
A magnesium (Mg2+) level in blood plasma is determined to be 2.5 mEq/L. Express this concentration in terms of milligrams per L (AW=24).
A. 120
B. 30
C. 0.208
D. 2.5

Question 2
How many mEq of KCl are represented in a 15 mL dose of a 10%(w/v) KCl elixir? (FW=74.5).
A. 20
B. 10
C. 15
D. 0.15

Question 3
What is the concentration in g/mL of a solution containing 4 mEq/mL of CaCl2·2H2O (FW=147).
A. 4
B. 74.5
C. 0.294
D. 2

Question 4
A solution contains in each 5 mL
a) 0.5g of potassium acetate C2H3KO2 (MW-98)
b) 0.5g potassium bicarbonate KHCO3 (MW-100)
c) 0.5g potassium citrate C6H5K3O7.H2O (MW-324)
How many mEq of K+ are represented in each 5 mL of solution?
A. 5.2
B. 1.5
C. 14.73
D. 10.1

Question 5
A solution contains 10 mg/100 mL of Ca+2 ions. Express this concentration in terms of mEq/L.
A. 80
B. 100
C. 20
D. 5

Question 6
A person is to receive 2 mEq of sodium chloride per kilogram of body weight. If the person weighs 132 lb., how many milliliters of a 0.9% sterile solution of sodium chloride should be administered?
A. 780
B. 7020
C. 117
D. 58.5

Question 7
A electrolyte solution contains 4.6mEq of calcium per liter. How many grams of CaCl2.H2O (MW=147) should be used in preparing 20 liters of solution?
A. 135.24
B. 338.1
C. 6.76
D. 46

Question 8
A 1000 mL sterile solution of ammonium chloride contains the 21.4 mg/mL. Calculate the amount in terms of mEq of NH4Cl (MW= 53.5) in 500 mL container.
A. 46
B. 22
C. 15
D. 200

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