1. $$$ Quiz $$$ Solutions

2. Liquids that are soluble in each other miscible

3. Liquids that are not soluble in each other immiscible

4. When a solution contains more solute than it should. supersaturated

5. When you can’t add more solute to the solution without it precipitating out. saturated

6. Solubility is usually expressed as …. grams of solute per 100 g of solvent

7. What is the formula for Henry’s Law? What do the variables stand for? S = Solubility P = Pressure

8. Roughly speaking, what is the difference between a dilute and concentrated solution? A dilute solution has a low amount of solute and a concentrated solution has a high amount of solute

9. What is the molarity of a solution that has 15 moles of a solute in 3 liters of solution? 5 M

10. What are the units of molarity? Mole/Liters

11. How many moles of solute are in 1500 mL of a 0.333 M solution? 0.5 moles

12. What is the name for a solid that is dissolved in a solution? Solute

13. What is the name for a liquid that does the dissolving in a solution? Solvent

14. What mass of CsBr (cesium bromide) is needed to make 1.5 L of a 3.0M solution? 212.8 g/mol x 4.5 moles = 957.6 grams CsBr

15. True or False. When you dilute a solution, the moles of the solution stay the same. True

16. If 5.0 mL of 5.0M HBr is used to make a 500 mL aqueous solution, what is the molarity of the dilute solution? M 1 V 1 =M 2 V 2, (5)(5)=500x = 0.05M

17. A solute plus a solvent gives a _______. Solution

18. What is the formula for mass percent? mass solute (g) x 100% mass solution (g)

19. What is the formula for parts per million (ppm)? mass solute (g) x 10 6 mass solution (g)

20. What is the formula for volume percent? volume solute (mL) x 100% volume solution (mL)

21. If the percent mass of a solution weighing 300 g is 6%, what is the mass of the solute?.06 = x/300g x = 18 g

22. Name the three colligative properties we studied? -Vapor pressure lowering -Boiling point elevation -Freezing point depression

23. What is the formula for freezing point depression?  T f = K f x m x i

24. What is the formula for freezing point depression?  T f = K f x m x i

25. What type of compounds are always electrolytes? Ionic compounds

26. What is the formula for molality? moles solute/kg of solvent

27. What is the Van’s Hoff factor of MgO? 2

28. What is the Van’s Hoff factor of Na 2 O? 3

29. What is the Van’s Hoff factor of SF 3 ? 1, molecular (covalent) compound

30. If you calculate a  T f of -12.3 o C for a pure substance that melts at 3.4 o C, what is its new melting point? -8.9 o C