Practice problems
| # | Question |
|---|---|
| 1 | What is the density of 39 ml of a liquid that weighs 102 g ? |
| 2 | What is the weight in grams of 344 ml liquid, with a specific gravity of 3.16? |
| 3 | If a drug has specific gravity of 0.40. How many ml of drug do you need to get 20 g of drug? |
| 4 | What is the specific gravity of a 185 ml of liquid that weighs 445 g? |
| 5 | How many mg of a drug will be there in 10 ml of 0.40 % w/v timolol ophthalmic solution? |
| 6 | What is the volume of isopropyl alcohol required to make 200 ml of rubbing alcohol (70% v/v isopropyl alcohol) |
| 7 | How many grams of dextrose are required to prepare 4990 ml of 84 % solution? |
| 8 | Calculate the % w/v of 26 w/w % NaCl solution having a specific gravity of 1.19. |
| 9 | Calculate the % w/w of a solution prepared by dissolving 85 g of a drug in 3400 ml of water? |
| 10 | A pharmacist dispenses 15 ml of 8 % 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 : 881 as a percent strength. |
| 12 | Express 3.00 % as a ratio strength. |
| 13 | Calculate the milligrams of drug required to prepare 35 ml of a 1: 205 antiseptic solution. |
| 14 |
How many milligrams of hexachlorophene should be used in compounding the following prescription? |
| 15 | Express 48 g in 850 ml as mg/ml. |
| 16 | Express 82 % w/v as mg/ml. |
| 17 | Express 1: 4400 (w/v) as mg/ml. |
| 18 | Calculate the concentration of copper in ppm if 9 ml of tap water contains 3 X 10 -5 parts of copper. |
Answers
The Answer to question 1 is: 2.62 g/ml
The Answer to question 2 is: 1087.04 g
The Answer to question 3 is: 50.00 ml
The Answer to question 4 is: 2.41
The Answer to question 5 is: 40.00 mg
The Answer to question 6 is: 140.00 ml
The Answer to question 7 is: 4191.60 g
The Answer to question 8 is: 30.94 % w/v
The Answer to question 9 is: 2.44 % w/w
The Answer to question 10 is: 400 mg
The Answer to question 11 is: 0.11 %
The Answer to question 12 is: 1 : 33
The Answer to question 13 is: 170.73 mg
The Answer to question 14 is: 10.87 mg
The Answer to question 15 is: 56.47 mg/ml
The Answer to question 16 is: 820.00 mg/ml
The Answer to question 17 is: 0.23 mg/ml
The Answer to question 18 is: 3.33 ppm