Chem Catalyst:

Homework: ① Finish and Study from Stoich Review WS

Table of Contents:

79 – Kickstarting my Project 80 – Stoich Review WS81- Notes: Solutions and Molarity82- Flowchart Aluminum Lab83- Stoich Review WS #2

Please have a calculator next to you.

4NH3 (g) + 5O2 (g) 4NO (g) + 6H20 (g)

If you have 10 moles of NH3, and excess oxygen, how many grams of NO are produced in the reaction?

Agenda• Catalyst (10 minutes) • Community Circle (30 minutes) • Kickstarting my Project (50 min) • Balance and solve (30 minutes)

– Try, go over as a class, try, go over as a class.

Aluminum Chloride Limited Reagent Lab Monday and Tuesday of next week.

Community Circle Norms

• You may only speak twice. • You must respect your peers• Only the person holding the Bruin may speak. • Be honest. Nobody will be mad at you. • Be open to everyone else’s opinions.

5 more weeks till the semester ends.

• I feel like Chemistry is … • I feel like I’m not doing well because…. • I feel like I’m doing well because…• A Grizzly victory last week was…• I feel like…. • My peers…• My teachers…. • My parents….

GO Beyond, my classes are getting harder, or chemistry is hard.

Kick-starting my Project Class Expectations

• Conversation level: Low• Help: Approach teacher• Activity: Looking through notes, and

brainstorming on the handout. • Movement: None• Participation: Finish handout within 60

minutes.

Chem Catalyst:

Homework: ① Finish and Study from Stoich Review WS #1 for a QUIZ the next time I see you.

Table of Contents:

79 – Kickstarting my Project 80 – Stoich Review WS81- Notes: Solutions and Molarity82- Flowchart Aluminum Lab83- Stoich Review WS #2

Please have a calculator next to you.

4NH3 (g) + 5O2 (g) 4NO (g) + 6H20 (g)

If you have 5 grams of NH3, and excess oxygen, how many molecules of water are produced in the reaction?

Chemistry Agenda• Catalyst (10 minutes) • Notes: Solutions and Molarity (40 minutes)• Aluminum Chloride Lab Flow Chart (35 min) • Finish and Review Stoich Review WS #1 (20

min) • Exit Slip (15 min)

• Homework: Study for Quiz on Monday

Honors Agenda• Catalyst (10 minutes) • Notes: Solutions and Molarity (40 minutes)• Aluminum Chloride Lab Flow Chart (25 min) • Finish Limited Reagents Notes (15 min) • Start Limited Reagents Stoich WS (15 min)• Exit Slip (15 minutes)

• Homework: Finish Stoich Review WS and study for quiz on Tuesday

Which tastes the strongest?

Justify

• Why did the cup you picked taste the strongest? What was different about it from the other cups?

Today’s Learning Objectives• I can identify the solute and solvent

in a given solution. • I can calculate the molarity and

percent composition of a solution • 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 ___________.

3. 20g Potassium chlorate powder _____________, 20 mL ethanol (alcohol)_______, homogenous mixture of powder and ethanol_____

How do we calculate molarity?

Concentration

• The concentration 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 KClO3 you dissolve 1,220 g of KClO3 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 KClO3 you dissolve 1,220 g of KClO3 in 1 L of water. What is the molarity of your final solution?

White Board Races

Question 1

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

Question 2

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

Question 3

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

Question 4

• You have 52 g of H2SO4 dissolved in 0.5 L. What is the molarity of the solution?

Question 5

• You have 52 g of CaCl2 dissolved in 0.1 L. What is the molarity of the solution?

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

Class Example

• If you have a 3 L of a 0.6 M solution of AgNO3, then what mass of AgNO3 is contained in this solution?

Class Example

• If you have a 3 L of a 0.6 M solution of AgNO3, then what mass of AgNO3 is contained in this solution?

Table Talk

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

Table Talk

• 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

• Percent composition conveys the concentration in terms of percent of solute in a solution.

Class Example• A 4 g sugar cube (Sucrose:

C12H22O11) is dissolved in a 350 g of water. What is the percent composition by mass of the sugar solution that is created?

Table Talk• You have 5 moles of NaCl and

you dissolve this in 500 g of water, what is the concentration of this solution in terms of percent composition?

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

Table Talk

• If you react 4 moles of MnO2, how many particles of MnO2 did you use in this reaction?

Table Talk

• If you react 25 g of MnO2. How many particles of MnO2 did you use in this reaction?

Table Talk

• If you react 24 x 1023 particles of MnO2. How many moles of MnO2 did you use in this reaction?

Question 5

• You have 52 g of CaCl2 dissolved in 0.1 L. What is the molarity of the solution?

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