1. Drill – 3/26/08 1. What are the conditions of STP? 2. What volume is equivalent to one mole at STP? 3. How many molecules are in 4.04 g of H 2 ?

2. Drill – 3/27/08  Carbon monoxide combines with oxygen to form carbon dioxide. What volume of carbon dioxide is formed from 27 L of oxygen gas?

3. Drill – 3/30/11  What is a solution? Give 2 examples.

4. Drill – 3/31/11  What would you do to speed up how fast a solute dissolves in a solvent?

5. Drill – 4/4/11  Draw three beakers in each phase of solution: unsaturated, saturated, and supersaturated.

6. Solutions Chapter 12

7.  Solution: a homogenous mixture of substances. Examples: milk, salt water, gasoline, alloys  Suspension: a heterogeneous mixture of substances. Example: Muddy Water, all the mud will settle out of the water when at rest.  Colloid: a heterogeneous mixture with very small particles that do not settle. Example: mayo, gelatin, foam

8. The Components of a Solution: Solute – what is being dissolved, usually a solid but can be a gas or liquid as well. Solvent – the medium the solute dissolves in, usually water.

9. What if the solute isn’t solid?  Miscible – Mixable, two liquids can blend together  Immiscible – unmixable, two liquids which cannot mix.  Alloy – when two or more metals mix. This occurs at very high temps.

10. Solubility: the ability of a solute to dissolve in a solvent.  Insoluble  won’t dissolve  Partly Soluble  partially dissolves  Soluble  totally dissolves

11. Degrees of how much solute has been dissolved:  unsaturated  below maximum dissolvable threshold  saturated  solute is at the maximum threshold  supersaturated  more solute is in the solution than dissolvable. Sometimes crystallization will occur for specific compounds.

12. Electrolytes?  Electrolytes – substances that dissolve in water to give a solution that conducts electric current. IONS!  Non-electrolytes – substance that do not conduct electric current when dissolved in water. Molecules!  Video clip!

13.  In your notes, draw three beakers in each phase of solution: unsaturated, saturated, and supersaturated.  Compare your drawings with the person sitting next to you – make sure they make sense to both of you.

14. Alka-seltzer in Water  One alka-seltzer in 200 mL of water – design a lab to make it dissolve faster using whatever means you would like, so long as you don’t add any other chemicals and use 1 alka-seltzer and 200 mL H 2 O.

15.  Write a couple sentences explaining factors that you used (or that you now think that you should have used) in order to speed up the dissolution rate.

16. Solubility  The amount of substance required to form a saturated solution with a specific amount of solvent at a specified temperature  Grams of solute per grams of solvent