Exam 19: Calculations for Compounding

The word percent means

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

The material that is dissolved in a liquid compound is the

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?

The mass of 1.5 L of water is _______________.

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

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: _______________.

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

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.

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

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

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

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

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?

Another term for a solvent is

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

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

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

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

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