Deck 19: Calculations for Compounding

Question 1

Mixing ingredients together in order to make a solution, cream, ointment, or other product for a patient is known as

A) compounding.
B) alligation.
C) dilution.
D) QSAD.

Answer 1

compounding.

Question 2

A liquid that is used to dissolve other ingredients is called a diluent or

A) compound.
B) solute.
C) solvent.
D) oil base.

Answer 2

solvent.

Question 3

Another term for a solvent is

A) oil base.
B) diluent.
C) compound.
D) solute.

Answer 3

diluent.

Question 4

The material that is dissolved in a liquid compound is the

A) diluent.
B) compound.
C) solute.
D) solvent.

Question 5

The word percent means

A) "per medication."
B) "per hundred."
C) "per thousand."
D) "per calculation."

Question 6

In a liquid mixture that contains a solid medication, the percent strength represents the number of _____ of medication in each 100 mL of the mixture.

A) milligrams
B) grams
C) milliliters
D) liters

Question 7

In a liquid mixture that contains a liquid medication, the percent strength represents the number of _____ of medication in each 100 mL of the mixture.

A) milligrams
B) grams
C) milliliters
D) liters

Question 8

"Lidocaine 2 g, water qsad 100 mL" is the recipe for making 100 mL of a _____ lidocaine solution.

A) 0.2%
B) 2%
C) 20%
D) 200%

Question 9

Which of the following is a correct recipe for making 100 mL of a 3% sodium iodide solution from sodium iodide powder and water?

A) Sodium iodide 3 mg, water qsad 100 mL
B) Sodium iodide 3 mg, water 97 mL
C) Sodium iodide 3 g, water qsad 100 mL
D) Sodium iodide 3 g, water 97 mL

Question 10

How much lidocaine powder is needed to prepare 300 mL of a 2% solution, using water as the solvent?

A) 2 g
B) 3 g
C) 5 g
D) 6 g

Question 11

The inactive material into which an active ingredient is mixed in a solid or semisolid compound is known as the

A) compound.
B) solute.
C) solvent.
D) base.

Question 12

Which of the following is not a common example of a base for a solid or semisolid compounded medication?

A) Eucerin
B) Lidocaine
C) Petroleum jelly
D) Aquaphor

Question 13

The percent strength of a solid or semisolid mixture containing a medication represents the number of

A) grams of medication in 100 mg of the mixture.
B) milligrams of medication in 100 g of the mixture.
C) grams of medication in 100 g of the mixture.
D) milligrams of medication in 100 mg of the mixture.

Question 14

Which of the following is the correct recipe for making 50 g of a 2.5% triamcinolone ointment from triamcinolone powder and petroleum jelly?

A) Triamcinolone powder 2.5 g, petroleum jelly 97.5 g
B) Triamcinolone powder 1.25 g, petroleum jelly 48.75 g
C) Triamcinolone powder 1.25 g, petroleum jelly 98.75 g
D) Triamcinolone powder 2.5 g, petroleum jelly 47.5 g

Question 15

A pharmacy technician is preparing 200 g of a 1% hydrocortisone cream using hydrocortisone powder and a cream base. Before she starts, she wants to make sure she has enough of the cream base in stock, because the pharmacy is running low. How much of the cream base will she need?

A) 1 g
B) 2 g
C) 198 g
D) 199 g

Question 16

How much acyclovir powder and Aquaphor are needed to prepare 3 oz of 15% acyclovir ointment?

A) 13.5 g acyclovir, 76.5 g Aquaphor
B) 15 g acyclovir, 75 g Aquaphor
C) 15 g acyclovir, 85 g Aquaphor
D) 4.5 g acyclovir, 95.5 g Aquaphor

Question 17

How much zinc oxide powder and petroleum jelly are needed to prepare 80 g of a 2.5% zinc oxide ointment?

A) 2.5 g zinc oxide, 97.5 g petroleum jelly
B) 2 g zinc oxide, 98 g petroleum jelly
C) 2 g zinc oxide, 78 g petroleum jelly
D) 2.5 g zinc oxide, 77.5 g petroleum jelly

Question 18

How much cholestyramine powder is needed to prepare 4 oz of 6% cholestyramine paste, using Aquaphor as the base?

A) 3.5 g
B) 4 g
C) 6 g
D) 7.2 g

Question 19

How much Vaseline is needed to prepare 65 g of 4% zinc oxide ointment?

A) 61 g
B) 62.4 g
C) 97.4 g
D) 100 g

Question 20

How much salicylic acid powder is needed to prepare 75 g of 5% salicylic acid ointment?

A) 2.5 g
B) 3.75 g
C) 5 g
D) 7.5 g

Question 21

A commercial product that a pharmacy keeps on hand to prepare custom concentrations of chemicals is a(n)

A) QSAD.
B) alligation.
C) solute.
D) stock product.

Question 22

The pharmacy has received an order for 0.2% triamcinolone cream. Triamcinolone cream is commercially available in strengths of 0.1% and 0.5%, and the pharmacy has both of these strengths on hand. Which of the following methods is the best method to determine how much of each strength to use to create the 0.2% triamcinolone cream?

A) ratio proportion method
B) fraction proportion method
C) alligation method
D) dimensional analysis

Question 23

An order is received for 80 g of 0.3% triamcinolone cream. The pharmacy has on hand 0.1% and 0.5% triamcinolone creams. How much of each of these stock products is needed to prepare the ordered medication?

A) 15 g of the 0.1% cream and 45 g of the 0.5% cream
B) 10 g of the 0.1% cream and 30 g of the 0.5% cream
C) 30 g of the 0.1% cream and 50 g of the 0.5% cream
D) 40 g of the 0.1% cream and 40 g of the 0.5% cream

Question 24

A pharmacy technician has received an order for 0.5 L of 40% ethanol. On hand, the pharmacy has pure ethanol and 70% ethanol. She tries to use the alligation method to determine how much of each of these concentrations to use to achieve a 40% solution, but the calculations do not work because neither of the concentrations on hand is less than 40%. He decides to use the 70% ethanol for the higher concentration. What should he use for the lower concentration to achieve the 40% concentration?

A) water
B) pure alcohol
C) saline
D) 10% isopropanol

Question 25

Which of the following is a measure of the density of a substance?

A) specific gravity
B) concentration
C) weight
D) mass

Question 26

Which of the following is the volume of 186 g of water?

A) 100 mL
B) 186 mL
C) 100 L
D) 186 L

Question 27

If 50 mL of a solution has a mass of 62 g, what is the specific gravity of the solution?

A) 0.62
B) 0.81
C) 1.24
D) 1.62

Question 28

If 15 mL of a solution has a mass of 120 mg, what is the specific gravity of the solution?

A) 1.2
B) 1.5
C) 1.6
D) 1.8

Question 29

Glycerin has a specific gravity of 1.25. What is the volume of 85 g of glycerin?

A) 0.015 mL
B) 68 mL
C) 85 mL
D) 106.3 mL

Question 30

Ethylene glycol has a specific gravity of 1.125. What is the mass of 0.5 L ethylene glycol?

A) 0.4444 g
B) 0.5625 g
C) 2.25 g
D) 562.5 g

Question 31

A method of calculation used to determine the quantities of stock products needed to make a desired concentration is the _______________ method.

Question 32

Calculate the amount of sodium chloride needed to prepare 650 mL of 0.9% sodium chloride solution, using sodium chloride powder and water: _______________.

Question 33

Calculate the amount of pure ethanol needed to prepare 3 fl oz of 60% ethanol solution, using pure ethanol liquid and water: _______________.

Question 34

Calculate the amount of lidocaine needed to prepare 125 mL of 2% lidocaine solution, using lidocaine powder and water: _______________.

Question 35

Calculate the amount of pure isopropanol needed to prepare 0.5 L of 90% isopropanol solution, using pure isopropanol liquid and water: _______________.

Question 36

Calculate the amount of sodium chloride needed to prepare 2.5 L of 0.225% sodium chloride solution, using sodium chloride powder and water: _______________.

Question 37

Calculate the amount of potassium chloride powder needed to prepare 75 mL of 10% potassium chloride solution, using water as the solvent: _______________.

Question 38

Calculate the amount of dextrose powder needed to prepare 550 mL of 5% dextrose solution, using water as the solvent: _______________.

Question 39

Calculate the amount of metronidazole powder needed to prepare 60 g of 0.75% metronidazole cream: _______________.

Question 40

Calculate the amount of cream base needed to prepare 200 g of 0.07% betamethasone cream: _______________.

Question 41

Calculate the amount of cocoa butter needed to prepare 250 g of 1.5% hydrocortisone suppositories: _______________.

Question 42

Calculate the amount of zinc oxide powder needed to prepare 6 oz of 8% zinc oxide ointment: _______________.

Question 43

Calculate the amount of lidocaine needed to prepare 50 g of 4% lidocaine cream: _______________.

Question 44

Calculate the amount of cream base needed to prepare 2 oz of 3% lidocaine cream: _______________.

Question 45

Calculate the amount of salicylic acid powder needed to prepare 120 g of 5% salicylic acid ointment: _______________.

Question 46

Calculate the amount of Vaseline needed to prepare 135 g of 10% salicylic acid ointment: _______________.

Question 47

Calculate the amount of hydrocortisone cream needed to prepare 45 g of a 1.5% hydrocortisone cream using 2% hydrocortisone cream and a cream base: _______________.

Question 48

The pharmacy technician has been asked to prepare 450 mL of a 10% potassium chloride solution. On hand, the pharmacy has 5% and 20% potassium chloride solutions. She will need _______________ of the 5% potassium chloride solution to prepare this order.

Question 49

Calculate the amount of 90% ethanol needed to prepare 400 mL of 50% ethanol, using water as the diluent: _______________.

Question 50

Calculate the amount of 70% isopropanol needed to prepare 350 mL of 50% isopropanol, using 20% isopropanol as the diluent: _______________.

Question 51

Calculate the amount of water needed as a diluent to prepare 1,500 mL of a 3% sodium chloride solution using a 4.5% sodium chloride solution: _______________. (Round your answer to the nearest hundredth, if needed)

Question 52

Calculate the amount of 0.5% triamcinolone cream needed to prepare 100 g of 0.3% triamcinolone cream, using 0.1% triamcinolone cream as the diluent: _______________.

Question 53

Calculate the amount of 5% zinc oxide ointment needed to prepare 50 g of 15% zinc oxide ointment, using 30% and 5% zinc oxide stock products: _______________.

Question 54

Calculate the amount of 30% zinc oxide ointment needed to prepare 65 g of 15% zinc oxide ointment, using 30% and 5% zinc oxide stock products: _______________.

Question 55

Calculate the amount of 5% sodium chloride solution needed to prepare 400 mL of 0.9% sodium chloride solution, using water as the diluent: _______________.

Question 56

Calculate the amount of water needed to prepare 600 mL of 0.9% sodium chloride solution, using a stock solution of 5% sodium chloride: _______________.

Question 57

At 4 degrees Celsius, 80 mL of water has a mass of _______________.

Question 58

The mass of 1.5 L of water is _______________.

Question 59

If 125 mL of a solution has a mass of 134 g, calculate the specific gravity of the solution: _______________. Round your answer to four decimal places, if necessary.

Question 60

If 60 mL of a solution has a mass of 54.3 g, calculate the specific gravity of the solution: _______________. Round your answer to four decimal places, if necessary.

Question 61

If 3 L of a solution has a mass of 2,840 g, calculate the specific gravity of the solution: _______________. Round your answer to four decimal places, if necessary.

Question 62

If 500 mL of a solution has a mass of 15 oz, calculate the specific gravity of the solution: _______________. Round your answer to four decimal places, if necessary.

Question 63

Glycerin has a specific gravity of 1.25. The volume of 130 g of glycerin is _______________.

Question 64

A 10% solution of magnesium sulfate has a specific gravity of 1.1053. Calculate the volume of 75 g of 10% magnesium sulfate solution: _______________. Round to the nearest tenth if necessary.

Question 65

A 10% solution of acetic acid has a specific gravity of 1.014. Calculate the volume of 250 g of acetic acid: _______________. Round to the nearest tenth.

Question 66

A 350 mL sample of alcohol has a mass of 298 g. The specific gravity of the alcohol is _______________. Round your answer to four decimal places, if necessary.

Question 67

Normal saline has a specific gravity of 1.0046. The volume of 3 kg of normal saline is _______________. Round to the nearest milliliter.

Question 68

A 3% solution of sodium hydroxide has a specific gravity of 1.0336. Calculate the volume of 185 g of 3% sodium hydroxide: _______________. Round to the nearest milliliter.

Question 69

Ethylene glycol has a specific gravity of 1.125. The mass of 350 mL of ethylene glycol is _______________. Round to the nearest tenth of a gram.

Question 70

A 10% calcium chloride solution has a specific gravity of 1.854. Calculate the mass of 375 mL of the solution: _______________. Round to the nearest tenth if necessary.

Question 71

A 4% lactose solution has a specific gravity of 1.016. Calculate the mass of 1.5 L of the solution: _______________. Round to the nearest tenth if necessary.

Question 72

A 10% solution of magnesium sulfate has a specific gravity of 1.1053. Calculate the mass of 200 mL of the solution: _______________. Round to the nearest tenth if necessary.

Question 73

A 12% solution of ammonium chloride has a specific gravity of 1.0362. Calculate the mass of 1 L of the solution: _______________. Round to the nearest tenth if necessary.

Question 74

Phenol USP has a specific gravity of 1.07. Calculate the mass of 72.5 mL of phenol USP: _______________. Round to the nearest tenth if necessary.

Question 75

Rubbing alcohol has a specific gravity of 0.877. Calculate the mass of 650 mL of rubbing alcohol: _______________. Round to the nearest tenth if necessary.