1. Today’s Do Now 11/19/14 Answer the following questions 1.What does ‘mole’ stand for? 2.How many moles of Fe are in 235.45g of Fe?

2. By the end of the class period today I will be able to… Define mole to mole ratio and set up a mole to mole ratio Solve for moles or grams of a product given moles of a reactant

3. Mole Conversions Review What is the mass in grams of 0.375 mol of the element silver, Ag? A chemist produced 12.2 g of copper(II) chloride, CuCl 2. How many moles of copper(II) chloride were made?

4. Today’s Game Plan Do Now 10 minutes What is STOICHIOMETRY?3 minutes Mole to Mole Ratios 15 minutes Exit Ticket and Assign Homework 10 minutes

5. What is Stoichiometry?? Stoichiometry is the calculation of quantities in a chemical reaction. You will use a given amount of one substance in a chemical reaction to calculate an amount of another substance in that same reaction.

6. Interpreting a Chemical Equation 2 Fe(s) + 3 Cl 2 (g)  2 FeCl 3 (s) 2 moles of solid iron react with 3 moles of chlorine gas to produce 2 moles of solid iron (III) chloride.

7. Today’s Game Plan Do Now 10 minutes What does a Chemical Equation tell us?? 15 minutes Mole to Mole Ratios 15 minutes Exit Ticket and Assign Homework 10 minutes

8. Mole Ratios A mole ratio can be written to compare any two substances in a reaction. ____ BF 3 + ____ H 2 O  ____ B 2 O 3 + ____ HF Balance the Following Equation : 2631 The ratio of BF 3 to H 2 O is ____ : ____. 2 3

9. Mole Ratios The ratio of BF 3 to H 2 O is ____ : ___. ____ BF 3 + ____ H 2 O  ____ B 2 O 3 + ____ HF 2631 2 3 2 moles BF 3 3 moles H 2 O2 moles BF 3 3 moles H 2 O or

10. Mole Ratios The ratio of BF 3 to B 2 O 3 is ____ : ___. ____ BF 3 + ____ H 2 O  ____ B 2 O 3 + ____ HF 2631 2 1 2 moles BF 3 1 mole B 2 O 3 2 moles BF 3 1 mole B 2 O 3 or

11. Mole Ratios The ratio of H 2 O to HF is ____ : ____. ____ BF 3 + ____ H 2 O  ____ B 2 O 3 + ____ HF 2631 3 6 3 moles H 2 O 6 moles HF3 moles H 2 O 6 moles HF or

12. Put this in your notes… Grams of Given Moles of Given Moles of Unknown Grams of Unknown Each blue arrow represents a conversion factor Mole to Mole Ratio!!!!

13. Basic Stoichiometry Calculations If 8.2 moles of BF 3 react with an excess of H 2 O, how many moles of HF will be produced? 2631 ____ BF 3 + ____ H 2 O  ____ B 2 O 3 + ____ HF Our Problem:

14. Basic Stoichiometry Calculations If 8.2 moles of BF 3 react with an excess of H 2 O, how many moles of HF will be produced? 2631 ____ BF 3 + ____ H 2 O  ____ B 2 O 3 + ____ HF 8.2 mol BF 3

15. Basic Stoichiometry Calculations If 8.2 moles of BF 3 react with an excess of H 2 O, how many moles of HF will be produced? 2631 ____ BF 3 + ____ H 2 O  ____ B 2 O 3 + ____ HF x = mole HF 6 moles HF 2 mole BF 3 8.2 mol BF 3

16. Basic Stoichiometry Calculations 2631 ____ BF 3 + ____ H 2 O  ____ B 2 O 3 + ____ HF x = mole HF 6 moles HF 2 mole BF 3 8.2 mol BF 3 25 mol HF

17. If 6.5 moles of H 2 O reacts with an excess of BF 3, how many moles of B 2 O 3 are produced? 2.2 mol B 2 O 3

18. Put this in your notes… Grams of Given Moles of Given Moles of Unknown Grams of Unknown Each blue arrow represents a conversion factor Mole to Mole Ratio!!!! Molar Mass!!

19. How many grams of H 2 O are needed to react completely with 7.34 moles of BF 3 ?

20. If 6.57 moles of HF were produced in a reaction, how many grams of H 2 O reacted?

21. Molympics Basketball You will be competing as team to get the most points by the end of regulation (8 minutes) Each team member will answer one question at a time. SHOW ALL YOUR WORK!!! If you get stuck, you may ask a team member for help – but each question is not intended to be a group effort. Bring your answer to Ms. Krone and if it is correct, you will be able to take a shot (choose from the 1 pt or 2 pt line). If you miss, rebound your shot into the recycle bin (0 points, but you are saving the Earth…)

22. Today’s Game Plan Do Now 10 minutes What does a Chemical Equation tell us?? 15 minutes Mole to Mole Ratios 15 minutes Exit Ticket and Assign Homework 10 minutes

23. Homework Worksheet