1. Agenda LT: I can get better at limiting reactant questions. Do Now Agenda Discussion of Lab Put all the knowledge and math together Describing aqueous solutions Questions on Homework HW: Read and take notes on 342-344 do questions 28-35 and 53-55 on pg 347

2. Challenge Problems (LLP) 1. NH 3 + O 2 => NO + H 2 O  In an experiment, 3.25 g of NH 3 are allowed to react with 3.50 g of O 2 which is the limiting reactant, and how much NO should you get? 2. If 4.95 g of ethylene (C 2 H 4 ) are combusted with 3.25 g of oxygen, what is the limiting reactant and how much carbon dioxide is produced? 3. C 4 H 9 OH + NaBr + H 2 SO 4 => C 4 H 9 Br + NaHSO 4 + H 2 O  If 15.0 g of C 4 H 9 OH react with 22.4 g of NaBr and 32.7 g of H 2 SO 4 to yield 17.1 g of C 4 H 9 Br, what is the percent yield of this reaction?

3. Challenge Problem 4. A reaction container holds 5.77 g of P 4 and 5.77 g of O 2.The following reaction occurs: P 4 + O 2 P 4 O 6. If enough oxygen is available then the P 4 O 6 reacts further: P 4 O 6 + O 2 P 4 O 10. a) What is the limiting reagent for the formation of P 4 O 10 ? b) What mass of P 4 O 10 is produced? c) What mass of excess reactant is left in the reaction container?

4. Challenge Problems 5. Magnesium reacts with oxygen in the presence of heat to produce magnesium oxide. If you started with 28.63g of magnesium and 12.43g of oxygen, and produce 15.39g of magnesium oxide, what is your percent yield? 6. Iron pyrites (FeS 2 ) reacts with oxygen to produce iron (III) oxide and sulfur dioxide.If 300 g of iron pyrites is burned in 200 g of O 2, 143 grams of iron (III) oxide is produced. What is the percent yield of iron (III) oxide ? 7. 70 grams of manganese dioxide is mixed with 3.5 moles of hydrochloric acid. How many grams of Cl 2 will be produced from this reaction if the % yield for the process is 42%?