Quiz 3 Practice Calculations
Ch 15, 16, 17
1. You need to prepare 120 ml of potassium bromide 250 mg/ml. How much potassium
bromide should you weigh?
2. 22 degrees Celsius = _________ degrees Fahrenheit
3. You need to prepare 100 ml of celecoxib 100 mg/5 ml. How many capsules of 200 mg
celecoxib/capsule will you need?
4. Calculate days supply for the following : HCTZ 25 mg/5ml 150 ml, 12.5 mg daily
5. You need to prepare 30 g of salicylic acid 40% in petrolatum. How many g of salicylic acid
will you need?
6. 55 degrees Fahrenheit =
________ degrees Celsius
7. 10 g ethanol = __________ml
8. 15 ml glycerin = ____________g
9. You need to prepare 70 ml of lansoprazole 3 mg/ml suspension. How many lansoprazole 30
mg capsules will you need?
10. Calculate days supply: Viagra 50 mg #3, 50 mg PO prn not to exceed once daily
11. Calculate days supply: Tramadol 50 mg #36, one q.i.d.
12. You need to prepare 300ml of methylphenidate 10 mg/5ml suspension. How many tablets
of methylphenidate 20 mg/tablet will you need?
13. -5 degrees Celsius = __________degrees Fahrenheit
14. 10 g glycerin =_________ ml
15. You need to prepare 150 ml of clonidine 0.1 mg/5 ml suspension. How many tables of
clonidine 0.2 mg/tablet will you need?
16. You need to prepare 45 ml of baclofen 10 mg/ml. How many tablets of baclofen 10
mg/tablet will you need?
Quiz 3 Practice Calculations Answers
Ch 15, 16, 17
1. You need to prepare 120 ml of potassium bromide 250 mg/ml. How much potassium
bromide should you weigh?
250 mg
X mg
=
1 ml
120ml
X=250x120
X=30,000 mg, converted to g is 30 gm
2. 22 degrees Celsius = _________ degrees Fahrenheit
9x22=5F-160
198=5F-160
198+160=5F
358=5F
358/5=F
71.6=F
3. You need to prepare 100 ml of celecoxib 100 mg/5 ml. How many capsules of 200 mg
celecoxib/capsule will you need?
100 mg
X mg
=
5 ml
100 ml
5x=100x100
5x=10,000
X=10,000/5
X=2,000 mg
2,000mg/200mg per capsule=10 cap
4. Calculate days supply for the following : HCTZ 25 mg/5ml 150 ml, 12.5 mg daily
25 mg
X mg
=
5 ml
150 ml
5x=25x150
5x=3,750
X=3,750/5
X=750 mg
750 mg/12.5 mg/day=60 days
5. You need to prepare 30 g of salicylic acid 40% in petrolatum. How many g of salicylic acid
will you need?
40
Xg
=
100
30 g
100x=40x30
100x=1,200
X=1,200/100
X=12 gm
6. 55 degrees Fahrenheit =
9C=5x55-160
9c=275-160
9c=115
C=115/9
C=12.8 degrees
________ degrees Celsius
7. 10 g ethanol = __________ml
10 /0.79=12.7ml
8. 15 ml glycerin = ____________g
15x1.26=18.9g
9. You need to prepare 70 ml of lansoprazole 3 mg/ml suspension. How many lansoprazole 30
mg capsules will you need?
3 mg
X mg
=
1 ml
70 ml
X=3x70
X=210 mg
210 mg/30mg cap=7 cap
10. Calculate days supply: Viagra 50 mg #3, 50 mg PO prn not to exceed once daily
3 tabs total/1 tab per day=3 days
11. Calculate days supply: Tramadol 50 mg #36, one q.i.d.
1 tab 4 times a day=4 tab/day
36 tabs total/4 tab per day=9 days
12. You need to prepare 300ml of methylphenidate 10 mg/5ml suspension. How many tablets
of methylphenidate 20 mg/tablet will you need?
10 mg
X mg
=
5 ml
300 ml
5x=10x300
5x=3,000
X=3,000/5
X=600mg
600mg/20mg/tab=30 tab
13. -5 degrees Celsius = __________degrees Fahrenheit
9x-5=5F-160
-45=5F-160
-45+160=5F
115=5F
115/5=F
23=F
14. 10 g glycerin =_________ ml
10/1.26=7.9ml
15. You need to prepare 150 ml of clonidine 0.1 mg/5 ml suspension. How many tables of
clonidine 0.2 mg/tablet will you need?
0.1 mg
X mg
=
5 ml
150 ml
5x=0.1x150
5x=15
X=15/5
X=3 mg
3mg/0.2mg tab=15 tab
16. You need to prepare 45 ml of baclofen 10 mg/ml. How many tablets of baclofen 10
mg/tablet will you need?
10 mg
X mg
=
1 ml
45 ml
X=10x45
X=450mg
450mg/10mg tab=45 tab