Warm Up 7.1- Review of Naming & Bonding

1. Warm Up 7.1- Review of Naming & Bonding

2. Warm Up 7.1- Answers

3. Solutions Day 1

4. Demo #1: Making a solution First we need a solute and a solvent. What part was the- solvent: solute: solution: Now describe the following in your own words: solvent: solute: solution:

5. Factors that affect solutions When watching the clip, make sure you can explain why the rate of dissolving is affected by: 1. Temperature 2. Size of solute (particle size) 3. Stirring versus not stirring Video Clip

6. Likes Dissolve Likes: Intro

7. Demo #2: Like dissolves like Blue colored isopropyl alcohol (C3H7OH), Red colored water ( H2O), & Vegetable oil (C6H5O6) are mixed together. Now, answer the following: • What happened when all three were added together? • Explain why these observations make sense. • What did the color change represent? • Why is water considered to a universal solvent? • Compare the terms Soluble and Insoluble.

8. Likes Dissolve Likes Conclusion to demo: Water is polar or nonpolar? Isopropyl alcohol is polar or nonpolar? Vegetable oil is polar or nonpolar?

9. Likes Dissolve Likes: Definitions

10. Likes Dissolve Likes: A review of bonding & naming

11. Likes Dissolve Likes: A review of bonding & naming

12. Likes Dissolve Likes: Answers

13. Look at the image below, what word would you use to describe: miscible or immiscible.

14. Look at the image below, what word would you use to describe: miscible or immiscible.

17. Demo #3 Determine if the following are strong/weak electrolytes, or nonelectrolytes. After watching the demo explain why the observations make sense. • Solid NaCl • NaCl (aq) • C12H22O11 (aq) • 1M HCl (strong acid) • 6M HCl (strong acid) • HC2H3O2 (weak acid)

19. Electrolyte vs Nonelectrolyte • Electrolytes: conduct electricity • Ionic substances (aqueous or liquid) and strong acids • Nonelectrolytes: don’t conduct electricity Covalent cmpds and ionic if solid • The higher the concentration the stronger the electrolyte. Why do you think this is?

20. Electrolyte vs. Nonelectrolyte

21. Colligative Properties Why do we salt the roads in the winter? How does it work? Why would you add salt to a pot of water before it boils? Why do you add antifreeze to your car in the winter? How does it work? Why do you add coolant to your car in the summer? How does it work?

22. Colligative Properties When a solute is added to a solvent, it can change some solvent properties like: - raising the boiling point - lowering the freezing point

23. Molarity Formula: Molarity= moles of solute Liter of solution *** remember if your solute is given/measured in grams you can convert to moles by using molar mass ( unit 5)

24. Solution Song

25. Molarity Unit(s) :moles/L, Molar , M or [#] If I dissolve 3 moles of NaCl in 1 Liter of water ex: 3 moles/L or 3 molar *** All mean the or 3M same thing!! or [3]

26. Molarity: Vocab Concentrated: a lot of solute per solvent Dilute: small amount of solute per solvent Now you think of things you dilute at home- (think of things you add water to, especially food stuff)

27. Examples- Copy into Notebook • A saline solution contains 0.90 g NaCl in exactly 100mL of solution. What is the molarity of the solution? 2. How many moles of solute are present in 1.5L of 0.24M Na2SO4?

29. Molarity by Dilution Purpose: making a more dilute solution Formula:M1V1 = M2V2 How many milliliters of a stock solution of 2.00M MgSO4 would you need to prepare 100.0 mL of 0.400M MgSO4?