1. Catalyst 2/14/13 1.Write the chemical formula: a.Calcium phosphide b.Magnesium cyanide 2.Calculate the molar mass of lithium chromate. Please have your uniform on properly and ID around your neck.

2. Catalyst 2/14/13 1.Write the chemical formula: a.Calcium phosphide

3. Catalyst 2/14/13 1.Write the chemical formula: b. Magnesium cyanide

4. Catalyst 2/14/13 2. Calculate the molar mass of lithium chromate.

5. Agenda 2/13/13  Catalyst  Announcements  Facebook Project DUE MONDAY 2/18/13 (Print out project)  HW: Finish questions in packet for covered topics  Element of the Day  Grams to Moles Conversions Discussion  Class Practice  *Honors: VSEPR Theory  Exit Slip

6. Element of the Day I once was used in a solution with alcohol as a disinfectant. (Think of first aid solutions.) If you do not have enough of me in your system, you may eventually develop goiter due to a hormone deficiency. Like my neighbors on the Periodic Table, I have a low boiling point and if you heat me up a bit, I produce a thick, beautiful violet vapor. Who am I? (Please don’t yell out the answer until I ask for it!)

7. Element of the Day: Iodine

8. Class Points P3: 6 pts (focused, on time, neat room) P4: 7 pts (on time, focused) P6: 10 pts (on time, focused, neat room, working together) Your class can earn class points if everyone in class:  Comes to class quietly and on time  Stays focused and on task during class  Leaves classroom neat and organized  Students are teaching other students  Majority of class participates  Follows all classroom expectations and procedures  And more…

9. Objective 2/14/13 We will be able to  Describe the relationship between mass and moles.  Use molar mass to convert between grams and moles.  

11. Using Molar Mass 1. Calculate the molar mass of water. 2. What mathematical relationship between mass and mole can you determine by looking at the molar mass?

12. Aspirin Conversions Challenge  You are a chemist in a small pharmaceutical company that is attempting to synthesize a safer version of aspirin. Before you can start making anything, you need to do a little bit of math. To create enough aspirin for one bottle, you need: a) 3.5 moles of salicylic acid (chemical formula: C 7 H 6 O 3 ). What mass of salicylic acid do you need? b) 50 grams of acetic anhydride (C 4 H 6 O 3 ). How many moles of acetic anhydride do you need?

13. YOUR TASK Aspirin Conversions Challenge Instead of waiting for me to give you the steps, describe your own process of how you would answer the challenge questions. You will be given 10 minutes. The group with the BEST explanation wins a mystery prize.  Requirements  During the allotted time, you must be actively participating in your group  Your process MUST include a conversion factor  One or two people in your group must be able to CLEARLY explain your process  Every group member will show their work on their sheet  Hints  Think about how we did unit conversions last time  Use the molar mass  Use Mr. Gutierrez as your “lifeline” and ask for more hints

14. Class Discussion Expectations  Speak one at a time (raise your hand and wait to be called on)  NO disrespectful language (teasing, name-calling, cursing, etc.)  NO LAUGHING!  Address the IDEA NOT the person.  Clarify another student’s response by rephrasing or asking a clarifying question.  Always cite evidence for your explanations (why or how did you get your answer?)  Take notes to keep track of other people’s thoughts  Be mindful of “air time.”

15. Converting Mass to Moles - Example#1  How many moles are there in 25 grams of CO 2 ?

16. EXAMPLE#2:  How many grams are there in 3.5 moles of water?

17. During Classwork Time 1.Stay focused on the assignments you are given. 2.Do the questions INDEPENDENTLY (on your own). 3.Keep the noise level down. 4.Ask THREE before you ask ME. 5.You may put earphones on and listen to music quietly as you do your work. 6. You must finish a certain number of questions (depends on the person) by the end of the period. DO NOT FORGET YOUR STAMPS! You cannot get them once you leave the class.

18. How is today’s objective related to the objectives we’ve learned in the past?

19. Exit Slip QUIETLY and INDEPENDENTLY answer the following on Notability and email it to gutierrezbr@elizabeth.k12.nj.us with “p4 (or p6) ES 2/12” on the subject line. I must receive it by the end of the period. If you are talking or copying, you will not receive credit. gutierrezbr@elizabeth.k12.nj.us 1. How many moles are there in 35 grams of sodium phosphide? 2. How many grams are there in 2 moles of carbon dioxide?