Chapter 15: Community

Chapter 15: Community

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

SHORT ANSWER

Preparing Solutions and Changing Metric to Household Conversions

1. Prepare 4:1 water and vinegar soak for feet.

ANS:

4 mL : 1 mL :: x mL : 1000

x = 4000

4000 mL of water added to 1000 mL is 4:1 water–vinegar solution

2. Prepare 4000 mL of a 0.9% NaCl solution.

ANS:

0.9 g : 100 mL :: x mL : 4000 mL

100x = 3600

x = 36

36 g of NaCl in 4000 mL makes a 0.9% NaCl solution.

3. Prepare 16 oz of a 0.25% sodium hypochlorite solution from a 0.5% sodium hypochlorite solution. Use sterile water as the solvent.

ANS:

16 oz = 480 mL; may use 500 mL

0.25% of 0.5% :: x mL : 500 mL

0.25 mL : 0.5 mL :: x mL : 500 mL

0.5x = 125 mL

x = 250 mL

250 mL of 0.5% sodium hypochlorite added to 250 mL of water to make 0.25% sodium hypochlorite solution.

4. Prepare a mouth rinse of NaCl 2.5 g and baking soda 2.5 g in 250 mL H₂O. Change from metric to household conversion.

ANS:

NaCl 2.5 g =   teaspoon

Baking soda 2.5 g =   teaspoon

H₂O 250 mL = 1 cup

5. Prepare a sodium hypochlorite solution 0.25% from 24 mL bleach and 960 mL sterile water. Change from metric to household conversion.

ANS:

24 mL = 1 tablespoon + 2 teaspoons

960 mL = 32 oz