CH-8 Solutions – Dosage Calculations: A Multi-Method Approach : Exam Guide

Chapter 8 1. What is the strength (expressed as a percent) of a 200 milliliter solution that contains 10 grams of dextrose? 1. 20% 2. 5% 3. 0.2% 4. 0.5% Answer: 2 Rationale: 10/200 = 5%. 2. What is the strength (expressed as a percent) of a 500 milliliter solution that contains 35 milliliters of pure iodine? 1. 7% 2. 14.3% 3. 0.07% 4. 5% Answer: 1 Rationale: 35/500 = 7%. 3. What is the strength (expressed as a percent) of a 800 milliliter solution that contains 120 grams of dextrose? 1. 6.66% 2. 0.066% 3. 15% 4. 1.5% Answer: 3 Rationale: 120/800 = 15%. 4. What is the strength (expressed as a ratio) of a 30 milliliter solution that contains 300 milligrams of sodium chloride? 1. 300:30 2. 3:30 3. 10:1 4. 1:100 Answer: 4 Rationale: 300 mg = 0.3 g; 0.3/30 = 0.01 = 1:100. 5. What is the strength (expressed as a ratio in the lowest terms) of an 80 milliliter solution that contains 4 grams of lidocaine? 1. 4:80 2. 20:1 3. 1:20 4. 1:40 Answer: 3 Rationale: 4:80 reduced to lowest form yields 1:20. 6. What is the strength (expressed as a ratio in the lowest terms) of a 300 milliliter solution that contains 6 grams of epinephrine? 1. 6:300 2. 1:5 3. 1:50 4. 5:1 Answer: 3 Rationale: 6:300 reduced to lowest form yields 1:50. 7. How many milliliters of a 10% sodium chloride solution contain 8 grams of sodium chloride? 1. 125 mL 2. 80 mL 3. 0.8 mL 4. 800 mL Answer: 2 Rationale: 8 g × 100 mL/0.5 g = 80 mL. 8. How many milliliters of a 0.5% sodium chloride solution contain 400 milligrams of sodium chloride? 1. 800 mL 2. 80 mL 3. 200 mL 4. 2000 mL Answer: 2 Rationale: 0.4 g × 100 mL/0.5 g = 80 mL. 9. How many milliliters of a 12.5% glucose solution contain 125 grams of dextrose? 1. 10,000 mL 2. 1562.5 mL 3. 1000 mL 4. 156.2 mL Answer: 3 Rationale: 125 g × 100 mL/12.5 g = 1000 mL. 10. There are 70 milligrams of iodine in how many milliliters of a 1:4 iodine solution? 1. 0.28 mL 2. 17.5 mL 3. 175 mL 4. 280 mL Answer: 1 Rationale: 0.07 g × 4 mL/1 g = 0.28 mL. 11. How many milliliters of a 1:30 dextrose solution contain 3 grams of dextrose? 1. 10 mL 2. 100 mL 3. 90 mL 4. 9 mL Answer: 3 Rationale: 3 g × 30 mL/1 g = 90 mL. 12. How many milliliters of a 1:8 sodium chloride solution contain 300 milligrams of sodium chloride? 1. 24 mL 2. 37.5 mL 3. 2.4 mL 4. 375 mL Answer: 3 Rationale: 0.3 g × 8 mL/1g = 2.4 mL. 13. How many grams of NaCl are in 500 mL of normal saline? 1. 4.5 g 2. 45 g 3. 55.5 g 4. 5.5 g Answer: 1 Rationale: 500 mL × 0.98 g/100 mL = 4.5 g. 14. How many grams of NaCl are in 25 mL of 2% sodium chloride solution? 1. 12.5 g 2. 50 g 3. 0.5 g 4. 1250 g Answer: 3 Rationale: 25 mL × 2 g/100 mL = 0.5 g. 15. How many grams of dextrose are needed to prepare 250 mL of a 12.5% solution? 1. 2000 g 2. 2 g 3. 312.5 g 4. 31.25 g Answer: 4 Rationale: 250 mL × 12.5 g/100 mL = 31.25 g. 16. How many grams of pure iodine are in 2 liters of a 1:20 iodine solution? 1. 10 g 2. 100 g 3. 40 g 4. 400 g Answer: 2 Rationale: 2000 mL × 1 g/20 mL = 100 g. 17. How many milligrams of epinephrine are in 100 mL of a 1:10,000 solution? 1. 1 mg 2. 10 mg 3. 0.01 mg 4. 0.1 mg Answer: 2 Rationale: 100 mL × 1 g/10,000 mL = 0.01 g = 10 mg 18. How many milliliters of chlorine bleach are in 1 liter of a 1:5 bleach solution? 1. 200 mL 2. 20 mL 3. 0.2 mL 4. 2 mL Answer: 1 Rationale: 1000 mL × 1 mL/5 mL = 200 mL. 19. How many 10-gram tablets are needed to prepare 1 liter of a 1% solution? 1. 1 tablet 2. 0.1 tablet 3. 10 tablets 4. 100 tablets Answer: 1 Rationale: 1000 mL × 1g/100 mL = 10 g = 1 tablet. 20. How many 2-gram tablets are needed to prepare 100 mL of a 6% solution? 1. 3 tablets 2. 5 tablets 3. 30 tablets 4. 6 tablets Answer: 1 Rationale: 100 mL × 6 g/100 mL = 6 g = 3 tablets. 21. How many 60-gram tablets are needed to prepare 2 liters of a 12% solution? 1. 240 tablets 2. 40 tablets 3. 0.24 tablet 4. 4 tablets Answer: 4 Rationale: 2000 mL × 12 g/100 = 240 g = 4 tablets. 22. How many 5-gram tablets would you need to prepare 500 mL of a 1:10 solution? 1. 10 tablets 2. 1000 tablets 3. 1 tablet 4. 100 tablets Answer: 1 Rationale: 500 mL × 1 g/10 mL = 50 g = 10 tablets. 23. How many 10-gram tablets would you need to prepare 750 mL of a 1:5 solution? 1. 150 tablets 2. 15 tablets 3. 37.5 tablets 4. 375 tablets Answer: 2 Rationale: 750 mL × 1 g/5 mL = 150 g = 15 tablets. 24. How many 100-gram tablets are needed to make 1 liter of a 25% solution? 1. 2.5 tablets 2. 40 tablets 3. 4 tablets 4. 25 tablets Answer: 1 Rationale: 1000 mL × 25 g/100 mL = 250 g = 2.5 tablets. 25. From a full-strength hydrogen peroxide solution, how would you prepare 240 mL of two-thirds strength hydrogen peroxide solution for a wound irrigation using normal saline as the diluent? 1. 80 mL of hydrogen peroxide and 160 mL of normal saline 2. 160 mL of hydrogen peroxide and 240 mL of normal saline 3. 160 mL of hydrogen peroxide and 80 mL of normal saline 4. 80 mL of hydrogen peroxide and 240 mL of normal saline Answer: 3 Rationale: 240 mL (sol) × 2 mL (solute)/3 mL (sol) = 160 mL (solute). 26. How many milliliters of full-strength Sustacal are needed to prepare 300 mL of a 3/4-strength Sustacal solution? 1. 225 mL 2. 450 mL 3. 900 mL 4. 950 mL Answer: 1 Rationale: 300 mL (sol) × 3 mL (solute)/4 mL (sol) = 225 mL (solute). 27. How many milliliters of full-strength Sustacal are needed to prepare 240 mL of half-strength Sustacal? 1. 120 mL 2. 240 mL 3. 360 mL 4. 480 mL Answer: 1 Rationale: 1/2 = x/240240 mL (half) × 1 mL (Sustacal)/2 mL (half) = 120 mL (Sustacal). 28. How many ounces of half-strength Sustacal can be made from a 12-ounce can of full-strength Sustacal? 1. 6 oz 2. 24 oz 3. 36 oz 4. 15 oz Answer: 2 Rationale: 12 oz (full) × 2 oz (solution)/1 oz (full) = 24 oz (solution). 29. How many ounces of 3/4-strength Similac could be made from one 12-ounce bottle of Similac? 1. 20 oz 2. 18 oz 3. 16 oz 4. 9 oz Answer: 3 Rationale: 12 oz (full) × 4 oz (sol)/3 oz (full) = 16 oz (solution). 30. How many ounces of 1:10 strength formula could be made from one 24-ounce bottle? 1. 2.4 oz 2. 24 oz 3. 240 oz 4. 2400 oz Answer: 3 Rationale: 24 oz (full) × 10 oz (sol)/1 oz (full) = 240 oz of solution. Test Bank for Dosage Calculations: A Multi-Method Approach Anthony Patrick Giangrasso, Dolores M. Shrimpton 9780132158626