Calculations

Question 1

A mixture of substances made by dissolving solids in liquids is called a:

Answer 1

Solution

Question 2

What is the formula to calculate the concentration of a solution?

Answer 2

Concentration = mass (g) divided by volume (ml)

Question 3

Given a 45% solution and sterile diluent, how would you make 3L of 15% solution?

Answer 3

1000 mL of 45% solution and 2000mL of sterile diluent

Question 4

Given a pure solution, how would you make 500 mL of 50% solution?

Answer 4

250 mL pure solution and 250 mL diluent

Question 5

What is the concentration (mg/ml) and concentration (%) of the following solution: 5g added to 200mL sterile water

Answer 5

25 mg/ml, 2.5%