Exam 19: Calculations for Compounding

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

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

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

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.

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

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.

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.

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.

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.

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

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

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

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

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

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

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.

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

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

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