Alligations and Powder Volume WK13
QUESTION 1
The package directions for a medication instruct you to add 4.2 mL of sterile water for injection to 1 g of dry powder to give a concentration of 200 mg/mL. What is the powder volume of the medication in mL?
QUESTION 2
You have a vial of penicillin G potassium containing 20 million units. The directions are to add 32 mL of sterile water for injection to reconstitute to a concentration of 500000 units/mL. What is the powder volume of the penicillin in mL?
QUESTION 3
To prepare 3 g of Unasyn, the package insert states to add 6.4 mL of diluent. The concentration obtained is 375 mg/mL. What is the powder volume in mL of the Unasyn?
QUESTION 4
A patient is ordered a 130 mg dose of a drug in 50 mL of D5W. A vial contains 1 g of the powdered drug. The drug has a powder volume of 0.4 mL. How many mL will be needed to fill the patient order?
QUESTION 5
10 million units of a powdered antibiotic are contained in a vial. A concentration of 500000 units per mL is obtained when sterile water for injection is added. The drug has a powder volume of 3.2 mL. How many mL of sterile water for injection should be added to the vial?
QUESTION 6
Using another vial of the antibiotic used in question 26, if 36.8 mL of sterile water for injection is added to the vial, what is the concentration of the reconstituted solution?
QUESTION 7
A 1 g vial of nafcillin is reconstituted with 3.4 mL of sterile water for injection.
A concentration of 250 mg/mL nafcillin is obtained. What is the powder volume in mL of the nafcillin?
QUESTION 8
A 1 g vial of nafcillin is reconstituted with 3.4 mL of sterile water for injection.
A concentration of 250 mg/mL nafcillin is obtained. If a patient requires a 200 mg dose in 250 mL of D5W, how many mL of the reconstituted solution are needed?
QUESTION 9
A powdered drug is available in 50 mg vials. The label states to add 3.8 mL of water for injection to get a concentration of 12.5 mg/mL. What is the powder volume in mL of the drug?
QUESTION 10
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
How many mL of each of a 20% stock solution and a 30% stock solution will a technician need to make 500 mL of a 28% solution?
QUESTION 11
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
How many grams of 10% boric acid ointment should be mixed with petrolatum (0%) to prepare 700 g of a 5% boric acid ointment?
QUESTION 12
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
You have on hand 10% and 3% ointments. You need to prepare 450 g of a 5% ointment. How many grams of each of the 10% and the 3% ointment will you need?
QUESTION 13
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
A technician is to prepare 2.5 liters of a 1:20 solution from a 30% solution and water. How many mL of the 30% solution and water are needed?
QUESTION 14
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
A TPN order requires 500 mL of D30W. You find that you do not have any D30W in stock; you only have D40W and sterile water. How many mL of D40W and sterile water will you need to complete this order?
QUESTION 15
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
You receive an order for 200 mL of potassium permanganate 1:5000 solution. You have in the pharmacy a 2% potassium permanganate stock solution. How many mL of the stock solution and purified water will you need to compound this prescription
QUESTION 16
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
How many mL of a 16% stock solution are needed to compound 400 mL of a 1:2500 solution?
QUESTION 17
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
Calculate how many mL of a 1:2 solution and mL of water are needed to prepare 50 mL of a 15% solution.
QUESTION 18
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
Calculate how many mL of a 30% stock solution and mL of an 85% stock solution are needed to prepare 3 liters of 60% solution.
QUESTION 19
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
A prescription is written for 4 fl. oz. of a 7.5% solution. How many fl. oz. each of a 10% stock solution and purified water will be needed to compound this prescription?
QUESTION 20
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
The technician is asked to prepare 2.5 L of D5W from a 45% dextrose solution and SWFI. How many mL of each will be needed?
QUESTION 21
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
An order is received for 60 g of a 1% ointment. Available in the pharmacy is 100 g of 2.5% ointment. How many grams of the 2.5% ointment and petrolatum (used for dilution of the ointment) will be required?
QUESTION 22
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
A technician is to prepare 500 mL of a 1:400 w/v solution from a 1% solution and purified water. How many mL of each will be needed?
QUESTION 23
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
An order for 60 mL of a 1% topical liquid is to be prepared from a 5% solution and purified water. How many mL of each are needed?
QUESTION 24
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
An order reads 30 mL of 0.6% solution. Available in the pharmacy are two stock solutions, 0.4% and 5%. How many mL of each stock solution will be used to fill the order?
QUESTION 25
For all questions in this section, put your answer in the following form: XX, XX
Do not add units to either number. Make sure to put the measurements in order of which compound comes first in the question.
The pharmacy has run out of 500 mL bags of 1/2 NS. The technician is to use 0.9% sodium chloride solution and sterile water for injection to make a 500 mL bag of 1/2 NS. How many mL of NS and SWFI will she need? ( Hint: 1/2 NS contains 0.45% sodium chloride.)
