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
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.
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_____
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?
Question 1
• You have a solution that is sugar dissolved in water. What is the solute in this solution?
Question 3
• You have 82 g of NaOH and you dissolve it in 4 L. What is the molarity of the solution?
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?
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 24 x 1023 particles of MnO2. How many moles of MnO2 did you use in this reaction?