DO NOW: Backpacks away, use whisper voice to work on catalyst: Please stand toward the back, new seats on their way. Paste Vocab on page 40R Pass up all Stoichiometry Study Guides TABLE OF CONTENTS: Unit 3: Stoichiometry and Solutions PgLeftRight 36Moles of Chalk LabStoich –Moles to grams 37Practice QuestionsNotes: Mole to Mole Ratios 38S’more Lab Pre-LabS’more Lab 39RERUN of Copper LabLab Debrief 40Article: Fritz HaberVocab Table Homework:

 Stoichiometry Test  Vocab Table using textbook first, then Ipad When done with test, turn it in to Mr. Narez, and quietly work on the vocab table until the end of the period. Speaking while anyone is taking a test will result in an automatic school detention.

DO NOW: Backpacks away, use whisper voice to work on catalyst: You have 3 cups of lemon water. 1 will contain dilute lemon juice, 1 will be a medium solution, and 1 will be the strongest in taste. What is the different in each substance? Do NOT paste anything yet TABLE OF CONTENTS: Unit 3: Stoichiometry and Solutions PgLeftRight 36Moles of Chalk LabStoich –Moles to grams 37Practice QuestionsNotes: Mole to Mole Ratios 38S’more Lab Pre-LabS’more Lab 39RERUN of Copper LabLab Debrief 40Article: Fritz HaberVocab Table 41CalculationsNotes: Concentration (M) Homework:

Notes: Concentration (M) Haber Article: Bubbles answered on 40L Haber Article: CELEL Paragraph Problems on 41L Please pass up Articles when done, you are NOT to write on them

Which tastes the strongest?

Today’s Learning Goals I can identify the solute and solvent in a given solution. I can calculate the molarity of a substance. Next week: I can use molarity to determine the number of grams of a compound found in solution.

How do we describe solutions?

Solute and Solvent The solvent is the substance that dissolves and is the primary ingredient in a solution. The solute is the substance that is being dissolved in the solvent. Solution has both a solvent and a solute Ex: Salt (Solute) + Water (Solvent) -> Salt Water (Solution)

Classify as a solute, solvent or solution 1. Water ________, Sugar _________, Lemon juice ________, Lemonade___________. 2. Water _________, Koolaide _________, koolaide powder ___________ g Potassium chlorate powder _____________, 20 mL ethanol (alcohol)_______, homogenous mixture of powder and ethanol_____

How do we calculate molarity?

Concentration The concentration (molarity) of a solution is the amount of a particular substance in a solution.

Molarity Molarity is a concentration unit. This concentration of a solution is defined by moles of solute dissolved per liter of solution.

Class Example I have 72 g of HCl that I dissolved in 4 L of solution. What is the molarity of this final solution?

Class Example I have 72 g of HCl that I dissolved in 4 L of solution. What is the molarity of this final solution?

Partner Talk In order to torture this gummy bear you need you make a solution of KClO 3 you dissolve 1,220 g of KClO 3 in 1 L of water. What is the molarity of your final solution?

Teacher Talks In order to torture this gummy bear you need you make a solution of KClO 3 you dissolve 1,220 g of KClO 3 in 1 L of water. What is the molarity of your final solution?

White Board Races

Example 3 You have a solution that is sugar dissolved in water. What is the solute in this solution?

Example 4 You have a solution of naphthalene dissolved in methanol. What is the solvent?

Example 5 You have 82 g of NaOH and you dissolve it in 4 L. What is the molarity of the solution?

Example 6 You have 52 g of H 2 SO 4 dissolved in 0.5 L. What is the molarity of the solution?

Example 7 You have 100 g of CaCl 2 dissolved in 0.1 L. What is the molarity of the solution?

 Read the Fritz Haber Article, answer bubbles on 40L just the answer  CELEL Paragraph use prompt on page 4. Open word doc INSIDE the digital portfolio from Semester 1.  Title your CEL as “Haber Article CELEL”  Practice Problems on 41L

DO NOW: Backpacks away, use whisper voice to work on catalyst: 1.You have 116 grams of NaCl in a 4L solution. What is the molarity/concentration of this salty solution? Do NOT paste anything yet TABLE OF CONTENTS: Unit 3: Stoichiometry and Solutions PgLeftRight 38S’more Lab Pre-LabS’more Lab 39RERUN of Copper LabLab Debrief 40Article: Fritz HaberVocab Table 41CalculationsNotes: Concentration (M) 42Flow ChartNotes: % Composition + PreLab 43 Homework: Study for Wednesday’s Quiz Review Avogadro’s Number at home

 Go over Q’s 3-4 on 41L (10)  Finish Notes and % Composition (20)  RERUN Reflection (20)  Complete Flow Chart for Thur/Friday’s Lab (35)  Error Analysis (30)

41L: Question 3 (Check your answers) 3. You have 350 g of KCO 3 in 200 mL. What is the molarity? 1L = 1,000 mL HINT: convert 200 mL into Liters first.

Question 4 (Check your answer) 4. You have 2.2 x molecules of NaCl in a 3L salty solution. What is the molarity? HINT: Use Avogadro’s number.

1.1M KF M KBr M KCO M NaCl 5.Diet Coke M CaCl 2

How do we determine grams from molarity?

Hold Up! We Can Work in Reverse We can work backwards if we have a molarity and volume of solution. From this we can determine both the moles and mass of our solute

Example 8 If you have a 3 L of a 0.6 M solution of AgNO 3, then what mass of AgNO 3 is contained in this solution?

Example 9 If all the water in 4L of a 0.45 M NaCl solution evaporates, what mass of NaCl remains?

How do we calculate percent composition?

Percent Composition by mass or volume % comp (v/v) = volume solute volume of solution OR

Teacher’s Example 1 A 4 g sugar cube (Sucrose: C 12 H 22 O 11 ) is dissolved in a 350 g solution of water. What is the percent composition by mass of the sugar solution that is created?

Teacher’s Example 1 A 4 g sugar cube (Sucrose: C 12 H 22 O 11 ) is dissolved in a 350 g solution of water. What is the percent composition by mass of the sugar solution that is created?

Example 2 You have 5 moles of NaCl and you dissolve this in 500 g of water solution, what is the concentration of this solution in terms of percent composition?

Example 3 You have 5 L of KCl solution and you initially dissolved 2L of KCl in water until it reached 5 L. What is the concentration of this solution in terms of percent composition?

Review If you react 25 g of MnO 2. How many particles of MnO 2 did you use in this reaction?

More Review: Partner Talk If you react 2.4 x particles of MnO 2 in a 3L solution, what would be the molarity of the substance.

Restate what was done means giving a summary of the procedure yet including measurements and the entire experimental set up. Explain the purpose using vocab. Restate the MEANING of the results. Uncertaining or errors; assume the equipment is always made correctly; go beyond the obvious. New findings: Restate the purpose, and respond to that. Include concepts, vocab, results, conclusions.

Contrast YOUR RERUN with the SAMPLE RERUN handout you picked up. Please place this sample rerun at the back pocket of your notebook for future reference. Norms: 1.You are reading your RERUN found on 39L 2.Read the sample RERUN, think about what is missing from your RERUN; annotate if needed.

1.On the back of that RERUN, what 3 things can you do to achieve a much higher grade the next time you write a RERUN or your future Lab Report? 2.What are you most proud of with respect to your scores? 3.At the bottom of the RUBRIC, there are some general rules, please restate those general rules in your own words. Fold graded Rubric in half and paste/tape the upper part of YOUR graded RUBRIC on top of page 39L but don’t cover the writing

 Error Analysis. No retakes can be done this Friday without having this done beforehand (30)  Complete Flow Chart for Thur/Friday’s Lab (30) 42L

DO NOW: Backpacks away, use whisper voice to work on catalyst: What is the molarity if a 500 mL solution contains 20 g of CaBr 2. Molarity is defined as the concentration of a solution in terms of moles of solute per L of solution. Note: 1L has 1000 mL (memorize Do NOT paste anything yet TABLE OF CONTENTS: Unit 3: Stoichiometry and Solutions PgLeftRight 36Moles of Chalk LabStoich –Moles to grams 37Practice QuestionsNotes: Mole to Mole Ratios 38S’more Lab Pre-LabS’more Lab 39RERUN of Copper LabLab Debrief 40Article: Fritz HaberVocab Table 41CalculationsNotes: Concentration (M) Homework:

Review Question on Molarity You have 52 g of CaCl 2 dissolved in 0.1 L. What is the molarity of the solution? Quickwrite: What if I gave you the molecules of CaCl 2 in solution instead of mass? How would you find molarity?

Connect 4 With a partner you will be using the connect 4 sheet to practice problems. Silently read through the directions on the sheet in front of you

Closing Time: Quiz #4  Molarity, Moles, Mass  Solute, Solvent, Solution  % Composition

DO NOW: Backpacks away, use whisper voice to work on catalyst: How many grams of NaOH are needed to make 100g of a 5% solution? Ans. 5g % Composition = m solute X 100 m solution Do NOT paste anything yet TABLE OF CONTENTS: Unit 3: Stoichiometry and Solutions PgLeftRight 36Moles of Chalk LabStoich –Moles to grams 37Practice QuestionsNotes: Mole to Mole Ratios 38S’more Lab Pre-LabS’more Lab 39RERUN of Copper LabLab Debrief 40Article: Fritz HaberVocab Table 41CalculationsNotes: Concentration (M) Homework:

Chem Catalyst: Homework: ① Molarity WS #1-4 Write these formulas % Composition = m solute X 100 m solution % Composition = v solute X 100 v solution Molarity = moles / L NEW Table of Contents: Unit 3B: Stoichiometry, Solutions, Acids and Bases  84 - Aluminum Lab  85 – Notes: % Composition  86 – Concentration Calculations  87 – Connect 4 Calculations  88 – Acid and Bases Handout Level 3 Question: How many grams of HCl are needed to make 50g of a 5% solution? % Composition = m solute X 100 m solution