2. Catalyst – March 9/3, 2010 HW OUT PLEASE 1. What are 2 properties of ionic compounds? 2. What is solubility? 3. What has a higher 1 st ionization energy: strontium or carbon?

3. Todays Agenda Catalyst Finish IE Lab: Is It Ionic? Go Over Lab Results Exit Question

4. Todays Objectives SWBAT explain trends in ionization energy. SWBAT collect and record data about unknown substances to determine which substances are ionic.

5. Guided Practice (GP) Which has a higher 3 rd ionization energy Silicon or Magnesium?

6. Guided Practice (GP) What has a higher 1 st ionization energy? Sodium or Neon?

7. Guided Practice (GP) What has a higher 2 nd ionization energy? Boron or Sodium?

8. GEE Test Practice:

9. REVIEW: Characteristics of Ionic Substances 1.Electrons are transferred 2.Bonds between metals and non- metals 3.They make crystals (usually solids, hard but can break) 4.High melting points 5.Good conductors of electricity when dissolved

10. Is It Ionic? Lab Now that youve learned what the general properties of ionic compounds are, its time to see if you can use those properties in the lab. Your goal is to determine whether or not each of the five unknowns is ionic in nature. You will use the three tests listed below to help you. As you complete each test, record the data and determine if the compound is ionic or not ionic.

11. Test Protocol Complete all three tests before moving on to the next substance

12. Test #1: Physical Analysis Analyze the COLOR, TEXTURE, STATE OF MATTER, HARDNESS, BRITTLENESS, SQUISHINESS, etc. Record descriptions in data table Use this to help you determine if it is ionic or not ionic

13. Test #2: Water Solubility Test Add 1 spoonful of each substances to an Erlenmeyer flasj with about 50 mL of water Record results in data table Use this to help you determine if it is ionic or not ionic

14. Test #3: Conductivity Test Pour some of sample from the Water Solubility Test into Petri dish Measure the conductivity of the substance Listen to directions from Ms. Stroh on how to set up the circuit Look closely at the light bulb to see if it lights up Use this to help you determine if it is ionic or not ionic

15. LAB EXPECTATIONS…follow them or cry Speak only loud enough so that only your group can hear you Do not move on to the next station until I say to Follow all lab safety procedures Neglecting to follow any directions will result in book work. Read pages 220-227 Chapter Questions 1-20

16. Lets go over your results… 1. Physical Analysis 2. Water Solubility Test 3. Conductivity Test

17. Exit Question 1. Mr. LY wants to see if a new energy drink will help his muscles get even bigger. The energy drink has potassium chloride and sodium chloride in it. It also conducts electricity. Is the drink ionic? Why or why not?