1. Agenda 2/20/2015 5 A Day Slip Quiz – timed Tell me about ammonia Mole Ratios (Qu 11 - 14) Chapter 12: Stoichiometry and the Mole (1) Equations and Mole Ratios Work to do at home

2. 5A Day Slip quiz Write the correct formulas (including states) for the following substances – use your Naming flow chart – 4 mins. then turn in – I will grade again today. 1.Phosphoric acid (you have to know) 2.Hydrochloric acid (you have to know) 3.Carbon tetrachloride (liquid) 4.Ammonia (gas) 5.Hydrogen chloride (gas)

3. Amazing Ammonia? Talk to me/the group

4. Toby’s method X grams = 1mole N 2 x = 15.0g 30.0g 2 moles NH 3 12. This method is not correct because the mole ratio cannot be interpreted as a ratio of masses (the mass of different elements are different).

5. Toby’s method X grams = 1mole N 2 x = 15.0g 30.0g 2 moles NH 3 12. This method is not correct because the mole ratio cannot be interpreted as a ratio of masses (the mass of different elements are different).

6. 13. Show Rachel and Jerry’s method are mathematically equivalent. 30.0g NH 3 x 1 mole NH 3 x 1mole N 2 x 28.0g N 2 = 24.7g N 2 17.0g NH 3 2 molNH 3 1moleN 2

7. 13. Show Rachel and Jerry’s method are mathematically equivalent. 30.0g NH 3 x 1 mole NH 3 x 1mole N 2 x 28.0g N 2 = 24.7g N 2 17.0g NH 3 2 molNH 3 1moleN 2 According to Rachel 1.76 moles NH 3 x 1mole N 2 x 28.0g N 2 = 24.7g N 2 2 moleNH 3 1moleN 2

8. 13. Show Rachel and Jerry’s method are mathematically equivalent. 30.0g NH 3 x 1 mole NH 3 x 1mole N 2 x 28.0g N 2 = 24.7g N 2 17.0g NH 3 2 molNH 3 1moleN 2 According to Rachel 1.76 moles NH 3 x 1mole N 2 x 28.0g N 2 = 24.7g N 2 2 moleNH 3 1moleN 2 0.882 mole N 2 x 28.0g N 2 = 24.7g N 2 1moleN 2

9. 14. Use Rachel or Jerry’s method to calculate the mass of Hydrogen needed to make 30g of ammonia. 30.0g NH 3 x 1 mole NH 3 x 17.0g NH 3 Convert 30g of ammonia to moles

10. 14. Use Rachel or Jerry’s method to calculate the mass of Hydrogen needed to make 30g of ammonia. 30.0g NH 3 x 1 mole NH 3 x 3mole H 2 17.0g NH 3 2 mol NH 3 Now use mole ratios for Hydrogen and ammonia from the balanced equation to convert from moles of ammonia to moles of hydrogen.

11. 14. Use Rachel or Jerry’s method to calculate the mass of Hydrogen needed to make 30g of ammonia. 30.0g NH 3 x 1 mole NH 3 x 3mole H 2 x 2.00g H 2 = 5.29g H 2 17.0g NH 3 2 mol NH 3 1moleH 2 Finally convert from moles of hydrogen to gram of hydrogen. Viola! (Keep Extension questions safe for when we get to chapter 14, Gas laws.)

12. Work to do at home Written work due on: 24 Feb Complete Chapter 12: Stoichiometry and the Mole Homework worksheet Please note that YOU should Correct your answers to Mole Particle and Mole gram worksheet using keys posted on webpage (power points/worksheets tab)