Mannitol 20 how many grams

Chemistry Solutions

ANES 5101 Assignment # 3

Name: ______________________________________ Due date:

1. Identify the solute and the solvent in each solution composed of the following:

a) 10.0 g of NaCl and 100.0 g of H2O

Solute: __________ Solvent: __________

b) 50.0 mL of ethanol, C2H5OH, and 10.0 mL of H2O

Solute: __________ Solvent: __________

c) 0.20 L of O2 and 0.80 L of N2

Solute: __________ Solvent: __________

2. Water is a polar solvent and carbon tetrachloride (CCl4) is a nonpolar solvent. In which solvent is each of the following, which is found or used in the body, more likely to be soluble?

a) CaCO3 (calcium supplement), ionic : __________

b) retinol (vitamin A), nonpolar : __________

c) sucrose (table sugar), polar : __________

d) cholesterol (lipid), nonpolar : __________

3. Calculate the number of equivalents in each of the following:

a) 1 mole of K+ : __________

b) 2 moles of OH- : __________

c) 1 mole of Ca2+ : __________

d) 3 moles of CO32-: __________

4. An intravenous saline solution contains 154 mEq/L each of Na+ and Cl-. How many moles each of Na+ and Cl- are in 1.00 L of the saline solution?

5. An intravenous solution contains 40.0 mEq/L of Cl- and 15.0 mEq/L of HPO42-. If Na+ is the only cation in the solution, what is the Na+ concentration, in milliequivalents per liter?

6. When Amanda’s blood was tested, the chloride level was 0.45 g/dL.

a) What is this value in milliequivalents per liter?

b) According to Table 9.6, is this value above, below, or within the normal range?

Use the following table for problems

7. Determine whether each of the following solutions will be saturated or unsaturated at 20 °C:

a) Adding 25 g of KCl to 100. g of H2O : ________________________

b) Adding 11 g of NaNO3 to 25 g of H2O : ________________________

c) Adding 400. g of sugar to 125 g of H2O : ________________________

8. A solution containing 80. g of KCl in 200.0 g of H2O at 50 °C is cooled to 20 °C.

a) How many grams of KCl remain in solution at 20 °C?

b) How many grams of solid KCl crystallized after cooling?

9. Predict whether each of the following ionic compounds is soluble or insoluble in water:

a) LiCl : ______________

b) AgCl: ______________

c) BaCO3: ______________

d) K2O: ______________

10. Calculate the mass percent (m/m) for the solute in each of the following:

a) 25 g of KCl and 125 g of H2O

b) 12 g of sucrose in 225 g of tea solution

11. A mouthwash contains 22.5% (v/v) alcohol. If the bottle of mouthwash contains 355 mL, what is the volume, in milliliters, of alcohol?

12. A bottle of champagne is 11% (v/v) alcohol. If there are 750 mL of champagne in the bottle, what is the volume, in milliliters, of alcohol?

13. For each of the following solutions, calculate the:

a) grams of 25% (m/m) LiNO3 solution that contains 5.0 g of LiNO3

b) milliliters of 10.0% (m/v) KOH solution that contains 40.0 g of KOH

14. Calculate the molarity of each of the following:

a) 2.00 moles of glucose in 4.00 L of a glucose solution

b) 4.00 g of KOH in 2.00 L of a KOH solution

15. Calculate the grams of solute needed to prepare each of the following:

a) 2.00 L of a 1.50 M NaOH solution

b) 4.00 L of a 0.200 M KCl solution

16. For each of the following solutions, calculate the:

a) liters of a 2.00 M KBr solution to obtain 3.00 moles of KBr

b) liters of a 1.50 M NaCl solution to obtain 15.0 moles of NaCl

17. A patient receives 100. mL of 20.% (m/v) mannitol solution every hour.

a) How many grams of mannitol are given in 1 h?

b) How many grams of mannitol does the patient receive in 12 h?

18. A patient receives 250 mL of a 4.0% (m/v) amino acid solution twice a day.

a) How many grams of amino acids are in 250 mL of solution?

b) How many grams of amino acids does the patient receive in 1 day?

19. A patient needs 100. g of glucose in the next 12 h. How many liters of a 5% (m/v) glucose solution must be given?

20. A patient received 2.0 g of NaCl in 8 h. How many milliliters of a 0.90% (m/v) NaCl (saline) solution were delivered?

21. A doctor orders 0.075 g of chlorpromazine, which is used to treat schizophrenia. If the stock solution is 2.5% (m/v), how many milliliters are administered to the patient?

22. A doctor orders 5 mg of compazine, which is used to treat nausea, vertigo, and migraine headaches. If the stock solution is 2.5% (m/v), how many milliliters are administered to the patient?

23. A CaCl2 solution is given to increase blood levels of calcium. If a patient receives 5.0 mL of a 10.% (m/v) CaCl2 solution, how many grams of CaCl2were given?

24. An intravenous solution of mannitol is used as a diuretic to increase the loss of sodium and chloride by a patient. If a patient receives 30.0 mL of a 25% (m/v) mannitol solution, how many grams of mannitol were given?

25. Calculate the final concentration of each of the following:

a) 2.0 L of a 6.0 M HCl solution is added to water so that the final volume is 6.0 L.

b) Water is added to 0.50 L of a 12 M NaOH solution to make 3.0 L of a diluted NaOH solution.

26. Determine the final volume, in milliliters, of each of the following:

a) a 0.500 M H3PO4 solution prepared from 50.0 mL of 6.00 M H3PO4 solution

b) a 5.0% (m/v) glucose solution prepared from 75 mL of a 12% (m/v) glucose solution

27. Determine the initial volume, in milliliters, required to prepare each of the following:

a) 255 mL of a 0.200 M HNO3 solution using a 4.00 M HNO3 solution

b) 715 mL of a 0.100 M MgCl2 solution using a 6.00 M MgCl2 solution

28. You need 500. mL of a 5.0% (m/v) glucose solution. If you have a 25% (m/v) glucose solution on hand, how many milliliters do you need?

29. A doctor order 100. mL of 2.0% (m/v) ibuprofen. If you have 8.0% (m/v) ibuprofen on hand, how many milliliters do you need?