Pharmaceutics Calculations Practice Set #10 with Answers

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**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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