Chemistry Solutions 1 1. Tell whether each speeds up or slows down the rate of solution formation: Heating, cooling, stirring, shaking, increasing surface area of a solid solute, decreasing pressure on a gaseous solute

2. In each, identify the solute and solvent: Duralumin alloy (90% Al, 9% Cu, 1% Mg),; Seawater; Soda Water; Gasohol (90% isooctane, 10% ethanol) Rubbing alcohol (70% isopropanol, 30% water)

3. Find the concentration of each solution in the desired units. A. Molarity of 2 moles of NaCl in .5L of water B. Molality of .5 moles of sucrose in 2kg of water

C. ppm of .2 moles of glucose (C6H12O6) in .25L of water D. grams per liter of 5 moles of sucrose (C12H22O11) in 1.5L of water E. Percent composition mass/mass of 10 moles of NaCl in 2L of water

4. For each problem in #3 convert the given unit of concentration to the other units: molarity, molality (assume density = 1), grams per liter, ppm, and percent composition by mass.

5. Convert the given unit to all the other units of concentration: A. 2.5M NaCl B. 90g per liter of glucose C. 25% NaOH solution D. 1m KBr

E. 10ppm Ca(OH)2

6. How many grams of KCI are needed to prepare one liter of a 3.00 molar solution?

7. How many grams of MgCl2 are needed to prepare 5.0 liters of a 2.00 M solution?

8. To make one liter of a 0.4 M BaCl2 solution, how many grams of solute are necessary?

9. How many grams of FeSO4 are used to make 400 mL of a 0.25 M solution?

10. How many grams of ZnSO4 are needed to prepare 500 mL of a 0.5 M solution?

11. How many grams of solute are needed to prepare 5.0 liters of 0.25 M Ca(NO3)2 solution?

12. Find the mass of potassium sulfate required to prepare 0.800 L of a 0.752 M solution. 13. What mass of CaCl2 is needed to prepare 0.32 L of a 0.75 M solution?

14. If 1.5 grams of Ca(OH)2 are added to 125 mL of water, what will be the molarity?

15. What is the molarity of a solution when 200 mL of water contains 5.0 grams of Na2CO3?

16. What is the molarity of a solution containing 1.96 g of H2SO4 in 50 mL of water?

17. What is the molarity of a solution containing 15 grams of KCl in 250 mL of water?

18. What is the molarity of 0.5 moles of NaOH in 2 liters?

19. Find the molarity of a solution that contains 377 g of acetone, C3H6O, in a volume of 0.762 liters.

20. What volume of water would be required to make a 0.60 M solution containing 40.0 g of CaCl2?