Ideal and Real Stoichiometry UNIT 9 Ideal and Real Stoichiometry

OBJECTIVES 5.5 Calculate the mass to mass stoichiometry for a chemical reaction. 5.6 Calculate the percent yield in a chemical reaction.

Review importance/usefulness of dimensional analysis  practice Warm up: Write and Balance the following equation. Hydrogen gas reacts with oxygen gas to produce water vapor Agenda: Warm up Take stoichiometry pre-test. Follow link to google form from class page. http://mrsgonsalves.weebly.com/2b- stoichiometry.html Review importance/usefulness of dimensional analysis  practice What is stoichiometry? Notes and WS 4. Homework: Complete any unfinished work OBJECTIVES Students will use dimensional analysis to solve mathematical problems Understand what stoichiometry means and how we can use mole ratios to solve a problem.

Warm up Agenda: (honors) Warm up Write and Balance the following equation. Hydrogen gas reacts with oxygen gas to produce water vapor Agenda: (honors) Warm up Take stoichiometry pre-test. Follow link to google form from class page. http://mrsgonsalves.weebly.com/2b-stoichiometry.html LAB REPORT and powerpoints Review importance/usefulness of dimensional analysis What is stoichiometry? Notes and WS 4. Homework: Read section 9.1 of the textbook and complete the section review ws OBJECTIVES Students will use dimensional analysis to solve mathematical problems Understand what stoichiometry means and how we can use mole ratios to solve a problem.

Did you sign up for science fair? Check and review homework Balance the following equation. Write all possible mole rations. ___H2 (g) + ___O2 (g) ___ H2O (g) Agenda: Did you sign up for science fair? Check and review homework What is stoich ws Honors: (9.1 section review) Intro to pHet  pHet in pairs Once you complete the ws come check the answers and take a copy of the HW 4. Homework: Complete post lab questions for pHet OBJECTIVES Students will use balanced equations to write mole ratios, predict the amount of products produced, identify the limiting and excess reagents

Check and review homework (9.1 section review) Warm up: Balance the following equation. Write all possible mole rations. ___H2 (g) + ___O2 (g) ___ H2O (g) Agenda: Warm up Check and review homework (9.1 section review) Intro to pHet  pHet in pairs 4. Homework: Complete post lab questions for pHet and “Honors only” page. OBJECTIVES Students will use balanced equations to write mole ratios predict the amount of products produced identify the limiting and excess reagents

Check and review homework Ideal Stoich Notes Practice worksheet Consider the following balanced equation: 2 Fe (s) + 3 Cl2  2 FeCl3 If you reacted 5 moles of Fe and 8 moles of Cl2, how much FeCl3 could be produced? Agenda: Warm up Check and review homework Ideal Stoich Notes Practice worksheet 5. Homework: Study for quiz next class OBJECTIVES Students will use balanced equations to write mole ratios predict the amount of products produced identify the limiting and excess reagents

SUMMARIZER Consider the following balanced equation: 2 Fe (s) + 3 Cl2  2 FeCl3 If you reacted 5 moles of Fe and 8 moles of Cl2, how much FeCl3 could be produced? Use the balanced equation to write your mole rations of Fe to FeCl3 and to Cl2 FeCl3 Convert your moles of each reactant to moles of product and compare the answers 2 mole Fe / 2 FeCl3 3 mole Cl2 / 2 FeCl3 5mol Fe 8mol Cl2 2 mole FeCl3     = 5 mole FeCl3 which reactant do you run out of first? How much FeCl3 is produced? 2 mole Fe Fe 2 mole FeCl3 5 moles = 5.33 mole FeCl3 3 mole Cl2 Do you have any excess reagent (leftovers)? 8.0 mol Cl2 - 7.5 mol Cl2 used 5 mole FeCl3 3 mole Cl2 = 7.5 mol Cl2 used 2 mole FeCl3 0.5 mol Cl2 left

SUMMARIZER Consider the following balanced equation: 2 Fe (s) + 3 Cl2  2 FeCl3 If you reacted 5 moles of Fe and 8 moles of Cl2, how much FeCl3 could be produced? c Use the balanced equation to write your mole rations of Fe to FeCl3 and to Cl2 FeCl3 - Convert your moles of each reactant to moles of product and compare the answers - What is your limiting reagent (which reactant do you run out of first?): How much FeCl3 is produced? - Do you have any excess reagent (leftovers)? 2 mole Fe / 2 FeCl3 3 mole Cl2 / 2 FeCl3     5mol Fe x (2 mole FeCl3 / 2 Fe) = 5 mole FeCl3 8mol Cl2 x (2 mole FeCl3 / 3 Cl2) = 5.33 mole FeCl3 Fe 5 moles 5 mole FeCl3 produced x (3 Cl2 / 2mole FeCl3) = 7.5 mol Cl2 used 8 mol Cl2 - 7.5 mol Cl2 used = 7.5 mol Cl2 left over

Warm up / Check and review homework (10 min) Collect pHet and HW Quiz Review homework and identify questions Agenda: Warm up / Check and review homework (10 min) Collect pHet and HW Quiz Homework: Read section 9.3 and complete limiting and excess reaction worksheet Pages for BLUE BOOK: 312-318 reading pg 316 Ex. Credit pg 321 ques #17-21 Pages for ONLINE BOOK: 296-302 reading pg 300 Ex. Credit pg 306 ques #17-21 OBJECTIVES Students will use balanced equations to write mole ratios and perform stoichiometric conversions.

Real Stoichiometry notes Homework: Practice problems #1-13 Consider the following balanced equation: 2 Mg (s) + O2  2 MgO If you reacted 32g Mg and unlimited O2, What is the theoretical yield in grams of MgO that could be produced? Agenda: Warm up review homework Real Stoichiometry notes Homework: Practice problems #1-13 OBJECTIVES Students will use balanced equations to write mole ratios and perform stoichiometric conversions.

Intro to lab and questions Lab work in groups Get a copy of the lab and begin reading the introduction and procedure. Agenda: Warm up - review safety Intro to lab and questions Lab work in groups Homework: Complete post lab questions and conclusions OBJECTIVES Students will calculate a theoretical yield and compare it to their actual yield measured in lab.

Intro to lab and questions Lab work in groups Get a copy of the lab and begin reading the introduction and procedure. Agenda: Warm up - review safety Intro to lab and questions Lab work in groups Homework: Complete post lab questions and conclusions OBJECTIVES Students will calculate a theoretical yield and compare it to their actual yield measured in lab.

Complete and turn in lab Review for quiz in pairs Agenda: Complete and turn in lab Review for quiz in pairs Homework: Study for quiz next class OBJECTIVES Students will calculate a theoretical yield and compare it to their actual yield measured in lab.

Agenda: Questions Quiz When done – turn in and take an element card from the beaker and write down the element you selected. Save this information. Begin research for element poster if you have time, we will work on these next class as well. OBJECTIVES Students will calculate a theoretical yield and compare it to their actual yield measured in lab.