Practice problems
| # | Question |
|---|---|
| 1 | What is the density of 60 ml of a liquid that weighs 188 g ? |
| 2 | What is the weight in grams of 453 ml liquid, with a specific gravity of 1.92? |
| 3 | If a drug has specific gravity of 1.60. How many ml of drug do you need to get 15 g of drug? |
| 4 | What is the specific gravity of a 315 ml of liquid that weighs 178 g? |
| 5 | How many mg of a drug will be there in 15 ml of 0.15 % w/v timolol ophthalmic solution? |
| 6 | What is the volume of isopropyl alcohol required to make 590 ml of rubbing alcohol (70% v/v isopropyl alcohol) |
| 7 | How many grams of dextrose are required to prepare 4330 ml of 77 % solution? |
| 8 | Calculate the % w/v of 14 w/w % NaCl solution having a specific gravity of 1.098. |
| 9 | Calculate the % w/w of a solution prepared by dissolving 50 g of a drug in 2200 ml of water? |
| 10 | A pharmacist dispenses 85 ml of 12 % w/v ibuprofen suspension, which is to be taken as 2 teaspoonful’s per day. How many milligrams of ibuprofen are contained per teaspoonful? |
| 11 | Express 1 : 647 as a percent strength. |
| 12 | Express 0.80 % as a ratio strength. |
| 13 | Calculate the milligrams of drug required to prepare 40 ml of a 1: 325 antiseptic solution. |
| 14 |
How many milligrams of hexachlorophene should be used in compounding the following prescription? |
| 15 | Express 84 g in 150 ml as mg/ml. |
| 16 | Express 1 % w/v as mg/ml. |
| 17 | Express 1: 3200 (w/v) as mg/ml. |
| 18 | Calculate the concentration of copper in ppm if 6 ml of tap water contains 4 X 10 -5 parts of copper. |
Answers
The Answer to question 1 is: 3.13 g/ml
The Answer to question 2 is: 869.76 g
The Answer to question 3 is: 9.38 ml
The Answer to question 4 is: 0.57
The Answer to question 5 is: 22.50 mg
The Answer to question 6 is: 413.00 ml
The Answer to question 7 is: 3334.10 g
The Answer to question 8 is: 15.37 % w/v
The Answer to question 9 is: 2.22 % w/w
The Answer to question 10 is: 600 mg
The Answer to question 11 is: 0.15 %
The Answer to question 12 is: 1 : 125
The Answer to question 13 is: 123.08 mg
The Answer to question 14 is: 175.00 mg
The Answer to question 15 is: 560.00 mg/ml
The Answer to question 16 is: 10.00 mg/ml
The Answer to question 17 is: 0.31 mg/ml
The Answer to question 18 is: 6.67 ppm