Week Six: Solutions and Dilutions

Question 1

What are solutions?

Answer 1

Combination of a solvent and a solute into a homogenous mixtrue

Question 2

When do we use solutions?

Answer 2

Liquid drugs, reconstituting medications, almost any liquid in a lab or clinic environment

Question 3

Reasons why concentration/solutions/dilutions are important

Answer 3

control amount of medications administered
accurate and flexible dosing
safer concentrations of chemicals
correct concentrations of testing solutions
cost-saving accuracy in solutions/ dilutions

Question 4

What is reconstitution?

Answer 4

Addition of apporpriate liquid solvent to a powdered solute to create a functional solution

Question 5

What are some things we reconstitue?

Answer 5

vaccines, drugs, laboratory media

Question 6

What is dilution?

Answer 6

Adding a substance, such as water, to a solution in order to lower the concentration

Question 7

When do we dilute?

Answer 7

liquid drugs
chlorhexidine solution and scrub
bleach
blood work
laboratory diagnostics

Question 8

Dilutions use ____ to refer to how diluted something is

Answer 8

ratios

Question 9

If we have 1 mL of a substance and add 9 mL of diluent, what is our dilution ratio?

Answer 9

1:10

Question 10

Dilution values are called _____.

Answer 10

Parts

Question 11

Sample problem:

5 mL Chlorhexidine is added to enough water to make 2,000 mL of solution. What is the dilution ratio?

Answer 11

5:2,000
Simplify:
5/2,000 = 1/x
Your simplified answer is 1:400

Question 12

Key words for stock solutions:

Answer 12

Have, use, start with, available

Originial has higher concentration and lower volume

Question 13

Key words for working solutions:

Answer 13

Make, ordered, end up with

Has higher volume, lower concentration